Ford Econoline 1967, Falcon 1967, Cougar 1967, Bronco 1967 User Manual

FOREWORD

This car maintenance manual provides the Service Technician with complete information for the maintenance operations on all 1967 Ford, Lincoln and Mercury cars, and the Bronco, Econoline, Falcon Club Wagon and Recreational Vehicles.

The maintenance information is grouped in three parts.. maintenance schedule, maintenance operations, and lubrication charts and specifications. The maintenance operations include in-vehicle

adjustments.

The descriptions and specifications in this manual were in effect

at the time this manual was approved for printing. The Ford

Motor Company reserves theligh.t to discontinue models at any time, or change specifications or design, without notice and with-

out incurring obligation.

SERVICE PUBLICATIONS

2-1

Secdoa

1 Engine 2 Transmission...

3 Chassis

Sedioa

4 Body .. 5 Electrical . . . . .

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P-ce

2 -1

..2-20

.2-23

hicles cannot be covered in complete detail here. If a vehicle is found to have a special component installed that is not fully covered herein, refer to the Shop Manual for that vehicle for complete details.

The maintenance operations described herein are to be considered as minimum operations on vehicles which are in operating condition and require only periodic checkup and service. If, upon inspection, a component requires

more than adjustment, cleaning or simple replacement, refer to the applicable Group No. in the appropriate Shop Manual for complete information.

All variations of all Ford-built ve-

COAT GASKET WITH ENG-..E OIL

filter element. Discard the air cleaner mounting gasket if it is excessively worn or damaged-

On a closed crankcase ventilation system air cleaner, remove the crankcase vent filter aOO gasket from the air cleaner body, if required.

CLEANING FILTER

ELEMENT

The celluk)Se fiber filter element mlWt never be cleaned with a solvent or cleaning solution. Also, oil mlWt Dot be added to the surfaces of the filter element or air cleaner body.

There are two procedures that can be used to clean the air filter element. One method is performed with the use of compressed air. The other is performed by tapping the element on a smooth horizontal surface.

Compressed Air Method

Direct a stream of compressed air through the element in the direction opposite that of the intake air flow, that is, from the inside outward. Extreme care m- be exerc8ed to preYeat rupture of the element material.

Tapping Method

Hold the element in a vertical position and tap it lightly against a smooth, horizontal surface to shake the dust and dirt out. Do not deform the element or damage tile gasket surfacs by tapping too bard. Rotate the filter after each tap until the entire outer surface has been cleaned.

the air cleaner assembly to the carburetor and the air duct.

On a closed crank~ ventilation system equipped car, disconnect the crankcase ventilation system hose at the crankcase vent filter.

2.. Remove the air cleaner assembly from the carburetor. To prevent dirt from enteriag the carburetor, the filter element m1Bt never be removed when the air cleaner body is m(Mlnted on the carburetor.

3. Remove the air cleaner cover and

CHECK ENGINE OIL LEVa

Check the oil level dipstick to be sure it indicates the correct quantity of oil in the crankcase. Be sure the oil is clean.

CHANGE ENGINE OIL AND FILTER

REMOVAL

1. Raise the car.

2. Remove the oil pan drain plug, and allow the engine oil to drain into a container.

3. Place a drip pan under the filter assembly (Fig. 1).

4. Turn the filter counterclockwise and remove it from the adapter.

INSf ALLA nON

1. Clean the gasket surfaces at the adapter.

2. Coat the gasket on the filter with a light film of oil. Screw the filter onto t~ adapter until the gasket contacts the sealing surface, then advance it II,. turn. Do not overtighten the filter.

3. Remove the drip pan and lower the car.

4. Fill the crankCase to its required level with the proper type and grade of lubricant.

5. Start the engine. Operate the engine at fast idle and check for oil

leakage.

6. Add additional lubricant if required.

CLEAN CARBURETOR AIR

CLEANER AND FILTER ELEMENT

REMOVAL

1. Remove the wing nuts retaining

2.2

PART 2

Maintenance Operations

CLEAN CRANKCASE OIL FILLER aREA THER CAP

Remove the cap and wash it in a low-volatility, petroleum-base solvent. Probe the breather hole(s) to assure removal of any accumulated deposits. Shake the cap dry and install it. Do not dry with compressed air as air pressure may damage the filter element.

INSPEcriNG FILTER ELEMENT

Hold the filter in front of a back-up light and carefully inspect it for any splits or cracks. If the filter is split or cracked, replace it.

CLEANING BODY AND COVER

Clean the air cleaner body and cover with a solvent or compressed air. Wipe the air cleaner dry if a solvent is used. Inspect the air cleaner body and cover for distortion or damage at the gasket mating surfaces. Replace the cover or body if they are damaged beyond

repair.

the carburetor so that the word Front faces the front of the car.

3. Place the air cleaner filter element

in the air cleaner body.

Make sure the filter is prolK!rly seated. If the word TOP is ilMlicated on the filter element, make sure the word TOP faces up.

4. Install the cover and connect the air in~t duct and valve assembly, if so equipped, to the air cleaner with the wing-type retaining screws. Tighten the screws.

S. On a closed crankcase ventilation system air cleaner, install the crankcase vent filter and gasket in tlM: air cleaner body, if it was previously removed. Connect the crankcase vent hose to the crankcase vent filter and tighten the

hose retaining clamp.

CLEAN AND REFILL OIL BATH

AIR CLEANER-ECONOLINE AND BRONCO

INSfAUADON

1. Install a new air cleaner mount-

ing gasket on t~ carburetor. if nec-

essary .

2. Install the air cleaner body on t~ carburetor so that t~ word Front faces t~ front of t~ car.

3. Place the air cleaner filter element in the air cleaner body. Make sure the element is ..-opeIty leafed. Install the cover and connect t~ air duct to the air cleaner. Tighten the retaining wing DUts.

On a closed crankcase ventilation system air cleaner. install t~ crankcase vent filter and gasket in the air cleaner body. if it was previously removed. Connect the crankcase vent hose to t~ crankcase vent filter and tighten t~ hose retaining clamp.

REMOVAL

1. Remove the carburetor to air

cleaner retaining wing nut.

On a cl~ crankcase ventilation equipped engine, loosen the hose clamp at the air cleaner body and disconnect the hose.

On a 240 Six engine, remove the bolts securing the air cleaner body to the support brackets.

2. Remove the air cleaner. Use care

to prevent on spillage.

CLEANING AND INSPECflON

1. Drain the air cleaner reservoir. Wash the air cleaner components and duct (if so equipped) in cleaning solvent, and dry them with compressed air.

CHECK AND ADJUST VALVE

LASH-MECHANICAL TAPPETS

It is very important that the valve lash be held to the correct specifications because:

If the lash is set too close, the valve will open too early and close too late, resulting in rough engine idle. Burning and warping of the valves will occur also because the valves cannot make firm contact with the seats long enough to cool properly. If the lash is excessive, it will cause the valve to open too late and close too early causing valve bounce. In addition, damage to the crankshaft lobe is likely because the tappet foot will not follow the pattern of the camshaft lobe, causing a shock contact between these two parts.

1. Be sure the engine is at normal operating temperature before attempting to set the valve lash.

If the engine is cold, start and operate it for a minimum of 30 minutes at 1200 rpm to stabilize engine temperatures.

2. Remove the air cleaner and other

obstructing hardware.

3. Remove the valve rocker arm

cover and gaskets.

4. With the engine idling, set the valve lash (Figs. 2, 3 or 4) .-i8g . step. type feeler: gauge only (go and no go). The final (hot) intake and exhaust valve

lash settings are listed in the Specifications Section in Group 8 of the appropriate Shop Manual.

For example, to obtain the correct

2. Inspect the gasket between the oil reservoir chamber and cleaner body and replace it if necessary.

3. Saturate the filter element wittl engine oil.

4. Fill the oil reservoir to the full mark with the recommended engine oil. Do not overfill.

STEP-TYPE fEELER GAUGE

REPLACE CARBURnOR

AIR CLEANER FILTER

REMOVAL

1. Remove the wing nuts retaining the air cleaner assembly to the carburetor and the air duct, if so equipped.

On a closed crankcase ventilation

system equipped car, disconnect the crankcase ventilation system hose at the crankcase vent filter.

2. Remove the air cleaner assembly from the carburetor. To prevent dirt fnMII enteriDg the cariMlretor, the filter element mlBt never be removed when the air cleaner body is mounted on the carburetor.

3. Remove the air cleaner cover and filter element. Discard the air cleaner mounting gasket if it is excessively worn

ordarnaged.

On a closed crankcase ventilation system air cleaner, remove the crankcase vent filter and gasket from the air cleaner body, if required.

INSI' ALLA nON

1. Install a new air cleaner mounting

gasket on the carburetor, if necessary.

2.. Install the air cleaner body on

INST ALLA nON

1. Position the air cleaner on the carburetor and install the retaining wing nut. UR care to ..-eveat oil

spillage.

On a 240 Six engine, ~re the air cleaner to the support brackets with the retaining bolts.

On a closed crankcase ventilation

system air cleaner, connect the ventilation system hose to the air cleaner body and tighten the retaining clamp.

Fig. 2-Valve lash Adjustment-

170 Six Engine

PART 2 - Maintenance Operations

2-3

Use the following procedure to run

in a new drive belt:

When installing new belt(s), first adjust to new belt SpeclficatiOlW. (Refer to Part 11-5 of the appropriate Shop

Manual.)

Run the engine for 10 minutes, then check the tension of tbe belts to make certain that they are within the reset spedftca~. Adjust the belts, if required, to used belt spedfications.

Fig. 5-Fan Drive Belt Tension Adjustment

Fig. 3-Valve lash Adjustment289 Hi-Performance V-8

ALTERNATOR

1. On a Lincoln, remove the alter-

nator splash shield.

2. Install the belt tension tool T62L8620-A on the drive belt. Check the tension following the instructions furnished with the tool (Fig. 5).

Due to the inaccessibility of the alternator belt on a Comet equipped with air conditioning and power steering, a belt tension gauge cannot be used. Therefore, it must be tensioned by the dellection method. DeOedion should not exceed 14 inch when thumb pressure is

applied.

3. If adjustment is necessary, loosen the alternator mounting bolts and the alternator adjusting arm bolt. Move the alternator toward or away from the engine until the correct tension is obtained. Remove the gauge. Tighten the alternator adjusting arm bolt first,

mended that a belt tension gauge be used to check and adjust the belt tension.

If any belt is broken, glazed, or worn, replace it with a new belt. Use only the specified type of belt.

If belt is stretched so that it cannot be tightened sufficiently, install a new belt.

On a Lincoln with tandem belts, replace both belts.

Any belt that has operated for a minimum of 10 minutes is considered a ~ed

belt, and, when adjusted, it must be adjusted to the reset tension sbown in the specifications.

S/ep- Type Feeler ~ge A1466-A

Fig. 4-Valve lash Adjustment427 Hi-Performance Engine

setting if the valve lash is 0.019 inch, use a step-type feeler gauge of 0.018 inch (go) and 0.020 inch (no go). The go step should enter, and the no go step should not enter. The resultant setting will be to the rtXIuired setting

(0.019 inch).

5. Examine the valve rocker arm cover gasket. If necessary to replace, clean the old gasket off the valve rocker arm cover. Coat one side of a new valve rocker arm cover gasket with oil resistant sealer. Lay the cemented side of the gasket in place in the cover.

6. Imtall the cover, making sure that the gasket seats evenly around the cylinder head. The cover is tightened in two Steps. First, torque the retaining bolts to specifications. Two minutes after the initial tightening, torque the bolts to the same specification.

7. Install the air cleaner and any hardware previously removed in step 1, above.

170.- SIX

CARaJRETOR

'AIR CLEANER

»9 V..

CHECK ENGINE ACCESSORY

DRIVE BELTS

BELT TENSION

Properly tensioned drive belts minimize noise and also prolong ~rvice life of the belt. Therefore, it is recom-

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Fig. 6-0il Filler Cap to Air Cleaner Hoses-Closed Ventilation System-Typical

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PART 2 - Maintenance Operations

INTAKE MANIFOl.D

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1700310 SIX

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and then the mounting bolts. Install the tension gauge and check the belt tension.

4. On a Lincoln, install the alter-

nator splash shield.

POWER STEERING

I. Loosen the mounting bolts incorporated on the front face of the pump cover plate (hub side) and the one nut at the rear.

1. Fix a 9/I6-inch open end wrench

on the projecting l/2-inch boss and pry

upward to correct tension. Do DOt pry against the resenoir to obtain proper belt load as it can be deformed and cause a leak.

3. Recheck the belt tension. When the tension has been correctly adjusted, tighten the bolts to specifications.

AIR CONDmONING

Adjust the belt by repositioning the idler pulley if so equipped. Otherwise, follow this procedure:

I. Loosen the bolts securing the compressor to the compressor mounting bracket. On a Lincoln. first remove the bolts securing the compressor to the support bracket that is attached to the cylinder head.

1. Install the tension gauge on the compressor clutch drive belt. Move the compressor toward or away from the engine until the specified belt tension is obtained. Remove the gauge. Tighten the compressor to support bracket bolts. Install the tension gauge and check the belt tension.

THERMACTOR AIR PUMP I. Loosen the air supply pump ad-

justIng arm nut and bolt.

1. Loosen the air supply pump

mounting bracket nut and bolt.

3. Move the air pump toward or

away from the engine until the correct tension is obtained. UE a suitable bar and IWY agalDSt the JKIInp rear cover to hold belt tension while tightening the mounting bolts. Do not IWY agaiDSt the pump boI8ing. Remove the gauge.

Tighten the air pump adjusting arm

and mounting bolts. Install the tension

gauge and check the belt tension.

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CLEAN POSITIVE CRANKCASE VENTILATION SYSTEM COMPONENTS-ALL VEHICLES EXCEPT LINCOLN

Current production vehicles which are equipped with positive crankcase vehtilation systems have the components located at different points on each type of engine. The following procedure is a general procedure. Specific procedures will be found in Group

240 SIX

A~A

Fig. 7-Crankcase Ventilation Regulator Valve, Hoses and Intake InletsTypical Six-Cylinder Installations

2-5PART 2

Maintenance Operations

8 of the Shop Manual for the vehicle being serviced .

REMOVAL OF COMPONENfS

Closed Ventilation System

Remove the following components from the crankcase ventilation system. Figs. 6 through 9 show typical components which should be removed. Refer to Group 8 of the appropriate Shop Manual for specific removal

procedures.

1. Remove the oil filler cap and its

connecting hose to the air cleaner.

1.. Remove the air cleaner (and ducts, if so equipped). Refer to Group 10 of the appropriate Shop Manual for specific removal procedures.

3. Remove the hose (Figs. 7 or 8) oj' hose assembly (Fig. 9) from the venti. lator valve in the rocker arm cover. Remove the other end of this hose (or hose assembly) from the intake manifold connection, or carburetor spacer connection, if so connected.

If a hose aSlembly was removed, disassemble the hoses from the tee or hot idle compensator, if so equipped.

4. Pull the ventilator valve from grommet in the rocker arm cover. Discard the ventilator valve 8S8eI8JIy.

Open Ventllotlon System

procedures.

1. Remove the hose (Fias. 7 or 8) or hose assembly (Fig. 9) from the ventilator valve in the rocker arm cover. Remove the other end of this hose (or hose assembly) from the intake manifold connection, or carburetor spacer connection if so connected.

If a hose assembly was removed, disassemble the hoses from the tee or hot idle compensator. if so equipped.

1.. Pull the ventilator valve from the grommet in the rocker arm cover. DiIC8rd die ventilator valve 88emb1y.

CLEANING

Closed Ventilation System

1. Wash the crankcase filler cap in a low-volatility, petroleum-base solvent. Shake the cap dry. Do not dry with ~pressed air. since air ~ may damage the filter element.

2. Remove the crankcase ventilation air filter (screen type) from the carburetor air cleaner body and clean it, using the ~ procedure as in step 1, and re-install it into the air cleaner

body.

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Fig. 8-Crankcase Ventilation Regulator Valve, Hoses and Intake Inlets-

Typical V-8 Installations

PART 2 - Maintenance Operations

2-6

HO11DLE C~PENSATOR

CARBURETOR

SPACER CONNECTING

NIPPLE

Open Ventilation System

Follow the same procedure outlined in steps 1 thru 4 for the Closed Ventilation System, above.

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HOSE ~.

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COVER

HOT IDLE COMPEHSATOR HOSE ASSEMBLY

Fig. 9-Hose Assemblies-Typical

CLEAN POSITIVE CRANKCASE VENTILATION SYSTEM COMPONENTS-LINCOLN

REMOVAL

Open Ventilation System

1. Remove the air cleaner.

2. Loosen the clamp securing the hose to the regulator valve. Remove the hose and clamp. Remove the ventilator valve from the ventilation tube fitting (Fig. 10) and discard it.

3. Loosen the clamps securing the hose to the ventilation tube and carburetor spacer. Remove the hose and

clamps.

4. Loosen the ventilation tube bracket retaining nuts and washers, then slide the ventilation tube out.

5. Remove the retaining bolts securing the outlet adapter to the valve push rod chamber cover. Remove the outlet

adapter gasket and oil separator element.

Closed Ventilation System

1. Remove the carburetor air

cleaner. When lifting the air cleaner

off the carburetor, raise the rear end of the air cleaner and remove the crankcase vent filter from the air cleaner.

2. Remove the anti-backfire valve vacuum line from the crankcase ventilation tube assembly.

3. Pull the crankcase vent adapter out of the front of the block.

4. Loosen the clamps securing the crankcase vent hose to the crankcase vent filter and the crankcase vent adapter. Remove the hose and clamps.

5. Remove the remaining venti la-

3. Connect one end of the hose (or

hose assembly) to the ventilator valve.

4. Connect the other end of the hose (or hose assembly) to the fitting on the intake manifold, or carburetor spacer (if so connected).

5. Install the carburetor air cleaner (and ducts, if so equipped). Refer to Group 10 of the appropriate Shop

Manual for specific installation pro-

cedures.

6. Install the oil filler cap on the oil

filler pipe. Connect the hose between the oil filler cap and the carburetor air cleaner.

3. Clean the tees and hot idle compensator (if removed in conjunction with a hose assembly) in clean carburetor solvent and dry them with compressed air.

4. Clean the rubber hoses with a low-volatility petroleum-base solvent and dry them with compressed air.

5. Clean the intake manifold or carburetor spacer connection by probing the inlet nipple or threaded opening with a flexible wire brush.

6. Do DOt attempt to clean the crank-

case ventilator valve. It should be replaced at the specified mileage intervals.

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Open Ventilation System

1. Clean the components outlined in steps 1, 3, 4 and 5, above, for the closed ventilation system.

2. Do not attempt to clean the crankcase ventilator valve. It should be re-

placed at specified mileage intervals.

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INSTALLAllON

Closed Ventilation System

1. Install a new ventilator valve into

the grommet in the rocker arm cover.

If the grommet is loose or damaged, use a new grommet.

2. Assemble the components of the

hose assembly (if an assembly was removed).

Fig. la-Positive Crankcase Ventilation System-Lincoln

PART 2

Maintenance Operations

2-7

tion system parts by following steps 2 through 5 under Open Ventilation

System.

4. Install the hose and clamp on the outlet adapter and ventilator valve. Position and tighten the clamp.

5. Install the hose and clamps on the carburetor and ventilation tube.

6. Install the air cleaner.

ADJUST CARBURETOR ACCELERATOR PUMP LEVER, IDLE SPEED, IDLE MIXTURE, AND FAST (COLD) IDLE SPEED

The following procedures apply to automatic choke type carburetors only. Manual choke carburetor adjustment procedures are given at the end of this group of procedures.

Closed Ventilation System

1. Follow steps 1 through 5 under

Open Ventilation System.

2. Connect the anti-backfire valve vacuum line to tre crankcase ventilation tube assembly (Fig. 9).

3. Install the crankcase vent hose and clamps on the crankcase vent filter and the crankcase vent adapter.

4. InstaU the air cleaner and connect the crankcase vent filter to the air cleaner.

REPLACE THERMACTOR AIR CLEANER ELEMENT, IF SO EQUIPPED

1. Remove the wing nut (Fig. 11)

and air horn assembly. Remove the filter element from the air horn as-

sembly.

2. Wipe the air horn assembly and air cleaner with a clean, dirt-free cloth to remove any accumulated dirt or foreign matter. Under extremely dirty

conditions it may be ~ to wash both the air horn and body in lowvolatility mineral spirits. Be sure the parts are dry before installing them.

3. The filter element ~ not cleanable. Place a new filter element on the air horn assembly. Position the assembled air horn and filter element in the air cleaner body. Be sure the tang ~ fitted in the sI~ (Fig. 11). Install the wing nut.

4. Start the engine and check for leaks. Refer to Part 8-1 of the appropriate Shop Manual for procedures for testing for proper operation.

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CLEANING

Closed Ventilation System

1. Wash the crankcase filler cap in a

low-volatility, petroleum-base solvent. Shake the cap dry. Do not dry with compressed air. since air pressure may

damage the filter element.

2. Remove the crankcase ventilation air filter from the carburetor air cleaner body and clean it, using the same

procedure as in step I, and re-install it on the air cleaner body.

3. Clean the oil separator element

and long ventilator tube in clean carburetor solvent a~ dry them with compressed air.

4. Clean the rubber hoses with a

low-volatility, petroleum-base solvent and dry them with compressed air.

5. Clean the carburetor spacer con-

nection by probing the inlet nipple with a flexible wire brush.

6. Do DOt attempt to clean tile cruk-

case ventilator valve. It should be replaced at the specified mileage intervals.

INSTALLAllON

Open Ventilation System

1. Install the oil separator element in the valve push rod chamber cover (Fig. 10). Make certain the screen is positioned snugly around the edges of the opening.

2. Coat a new outlet adapter gasket with oil-resistant sealer and position it on the push rod chamber cover. Position the outlet adapter on the cover and install the retaining bolts.

3. Slide the ventilation tube brackets under the retaining washers and nuts. Tighten the nuts. Install a new ventilator valve in the ventilation tube fitting.

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PRELIMINARY PREPARATION

-ALL VEHICLES

The engine idle speed is adjusted to settings for a hot engine and a cold engine (fast idle speed during choke operation). All final idle speed and mixture adjustments must be made on a hot, norma~ engine.

Refer to Figs. 12 through 20 for views of the idle fuel mixture and idle (hot engine) speed screws for the various carburetor applications.

I, Operate the engine until engine

temperatures are stabilized. On . car

with an air conditioner, operate the engine for twenty minutes before setting the engine idle speed. The engine idle speed is adjusted with the air conditioner

operating.

2. Position the transmission lever in neutral. Allow the throttle to drop back to the normal idle speed position. Attach a tachometer to the engine. Set

the parking brake.

On cars equipped with a vacuum release parking brake, remove the vacuum line from the vacuum power unit of the automatic vacuum release parking brake assembly, and plug the vacuum line. Set the parking brake. It is necegary to Inactivate the 'facuum power unit to keep the parking brake engaged when the engine is running during the adj4fitment procedures.

3. Turn on the head lamps. It is necessary to place the alternator under a load condition in this manner in order to obtain the specified engine idle speed during the ad~ment procedure.

4. On a car with a manual-shift transmission, the engine idle speed is checked and adjusted with the gear shift lever in neutral position. On a car with an automatic transmission, the engine idle

speed is checked and adjusted first with the transmission selector lever in the neutral position and readjusted with the transmission selector lever in the drive range position. Adjust and check the

engine idle speed. Be sure the dash pot (if so equipped) is not interfering with the throttle lever or the fast idle screw is not contacting the fast idle eam.

On a carburetor equipped with a hot

idle compensator, be sure the compensator is seated to ailow for proper idle adjustment.

'-2298-A

Fig. " -Typical Thermador Exhaust Emission System Air Cleaner

2-8

PART 2 - Maintenance Operations

When checking or adjusting idle (hot

engine) speed on any Thecmactor equipped engine with a thermal sensing valve in the distributor vacuum line, die valve m..t be bypassed. Disconnect the distributor vacuum' hose at the sensing valve. Plug or pinch~ff the

manifold vacuum hose; t~n cbeckor

adjust the idle speed in the normal

manner. Do not unplug and reconnect

the hose until after the fast idle (cold

engine) speed adjustments havt been

completed.

FORD t-V CARBURETOR Refer to Preliminary PreparatioD-

All Vehicles, above.

Adiust Accelerator Pump

Lever

The pump stroke is controlled by changing location oft~ roll p,inin the lever stop hole (Fig,. 12).

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2. Position the choke mechanism so that the choke plate is fully open. Seat the throttle plate in the throttle bore. It may be necessary to back oft' on the dasbpot (if so equipped) adjIWtment screw to seat the throttle plate in the throttle bore. Set the idle speed adjustment screw to just make contact with the stop on the carburetor lower body and turn the screw inward (clockwise) the specified turns.

Final Idle (Hot Engine)

Speed and Mixture Adiustments

1. Adjust the engine idle speed to specifications by turning the engine idle speed screw (Fig. 14) inward to increase the speed or outwar(i to de-

crease the speed.

2. Turn the idle mixture needle (Fig.

14) inward until the engine rpm begins to drop, due to the lean mixture. On a car equipped with a Thermactor exhaust emission system, turn the needle out-

ward 1/4 turn. The outward adj~nt

of the idle fuel mixture needle is the final adjIWtment required. On a car without

the Thermactor system, turn the needle outward until the engine rpm increases and begins to drop; then turn

1. For operation in ambient temperatures SOoF. and below, place the roll pin in the lever hole marked HI

(lower hole).

For best performance and economy

at normal ambient temperatures and

high altitude (above 50oP. and/or above

5,()X) feet altitude), place the roll pin

in the W (upper hole) of the lever.

2. Check the vent valve for proper

adjustment.

Initial Idle Speed and Fuel Mixture Adiustments

Refer to Figs. 13 and 14 for views of the Ford I-V carburetor idle fuel mixture and idle (hot engine) speed adjustment screws.

1. Set the initial idle fuel mixture by turning the idle mixture screw(s) (needle) inward (clockwise) until lightly seated; then, turn the screw(s) outward (counterclockwise) the specified turns.

Do not turn die needle(s) tightly aga~t their seat(s) as they may groove the eIMI(s). If a needle is damaged, it must be replaced before a satisfactory fuel mixture can be obtained.

the idle mixture needle inward for maximum rpm and engine smoothness.

3. After the correct engine idle mixture has been obtained, check the idle speed with the transmission selector lever in neutral and manually opening and closing the throttle. Adjust the idle speed to specification, if required.

If the car is equipped with an automatic transmission, position the selector lever in drive range to check and adjust the idle speed to specification, if necessary. Refer to Group 10 of the appropriate Shop Manual for specifications.

The final engine idle s~ may be varied to suit the conditions under which the car is to be operated.

4. Shut off the engine. Check the

fast (cold engine) idle speed.

On a Ford I-V carburetor, the fast (cold engine) idle adjustment screw (Fig. 14) is located on the left side of the carburetor. Refer to Fast (Cold

Engine) Idle Adjustment, below, for correct adjustment procedure.

FORD 2-V CARBURETOR Refer to Preliminary Preparation-

All Vehicles, above.

Adiust Accelerating Pump

Lever

The primary throttle shaft lever (overtravellever) has 4 holes and the accelerating pump link has 2 holes (Fig. 15) to control the accelerating pump stroke for various ambient temperatures and operating conditions of the engine.

The accelerating pump operating

rod should be in the specified hole in the overt ravel lever and the inboard hole (hole closest to the pump plunger) in the accelerating pump link (Fig. 15).

(Refer to Group 10 of the appropriate

Shop Manual for specifications.)

1. To release the rod from the re-

tainer clip, press the tab end of the clip

toward the rod; then, at the same time, press the rod away from the clip until it is disengaged.

2. Position the clip over the specified hole in the overtravel lever. Press the ends of the clip together and insert the operating rod through the clip and the overtravel lever. Release the clip to engage the rod.

Initial Idle Speed and Fuel Mixture Adiustments

It is of utmost importance that the

idle fuel system on 2-V carburetors be

balanced as closely as possible in order

to obtain a satisfactory, stable, idle and fuel mixture adjustment. This is achieved by establishing initial idle speed and mixture adjustments before

2-9

PART 2 - Maintenance Operations

FAST ~o~~"I~ '~E'I

FAST I1)LE tAM

82595..

Fig. '7 -Fast (Cold Engine) Idle

Speed Adjustment-Ford 2-V

8~1.8

Fig. 15-Accelerating Pump Stroke and Idle (Hot Engine) Speed Adjustments-Typical for Ford 2-V

dashpot (if so equipped) adjustment screw to seat the throttle plate in tile throttle bore. Set the idle speed adjustment screw to just make contact with the stop on the carburetor lower body, and turn the screw inward (clocKwise) the specified turns.

matic transmission, position the selector lever in drive range to check and adjust the idle speed to specification, if necessary.

The hi engine idle speed a.y be varied to suit the conditions under which tile car is to be operated.

4. Shut off the engine. Check the

fast (cold engine) idle speed.

On a Ford 2-V carburetor the fast (cold engine) idle adjustment screw (Fig. 17) is located on the right side or t~ carburetor. Refer to Fast (Cold Enaine) Idle Adjustment, below, for

correct adjustment procedure.

AUTOLITE 4-V (4300)

CARBURETOR

Refer to Preliminary Preparation-

AU Vehicles, above.

proceeding with the final idle speed and mixture adjustment. and the fast (cold

engine) idle speed adjustment.

With the air cleaner removed, make

the idle adjustments in the following sequence:

The idle fuel mixture and idle (hot

engine) speed adjustment screws for

the Ford 2-V carburetors are shown in Figs. IS and 16.

1. Set the initial idle fuel mixture by turning the idle mixture screw(s) (needle) inward (clockwise) until lightly seated; then, turn the screw(s) outward (counterclockwise) the specified turns. (Refer to Group 10 of the appropriate Shop Manual for specifications.) Do not turn the needle(s) tightly apjmt tbeir seat(s) as tbey may groove the end(s). If a needle is damaged, it must be replaced before a satisfactory fuel mixture can be obtained.

2. Position the choke mechanism so that the choke plate is fully open. Seat

the throttle plate in the throttle bore.

It may be necessary to back oft' on the

Adlust Accelerator Pump Stroke

The accelerator pump stroke (Fig.

18) has been calibrated to inject a predetermined quantity of fuel into the air stream with the pump pivot pin in the center (No.2) hole. The amount of fuel injected into the air stream may be altered by inserting the pivot pin in the left hole (No. J) to decrease the fuel quantity (sum~r operation) or to the right hole (No.3) to increase the fuel

quantity (winter operation).

Adjust the pump stroke as follows:

1. Remove the pump rod to pump

arm retainer. Remove pump rod from pump arm.

z. Remove the pump pivot pin re-

tainer. Remove pivot pin.

3. Insert the pivot pin into the de-

sired hole.

The holes in the fuel bowl vent lever. main body casing and the pump lever must be in line.

Fig. J 6-ldle Fuel Mixture

Adjustments-Typical for Ford 2-V

Final Idle (Hat Engine) Speed

and Mixture Adlustments

1. Adjust the engine idle speed to specifications by turning the engine idle speed screw (Fig. 15) inward to increase the speed or outward to decrease the speed. (Refer to Group 10 of the appropriate Shop Manual for

specifications.)

2. Turn the idle mixture needle(s) (Fig. 16) inward until the engine rpm begins to drop, due to the lean mixture. On a car equipped with a Thermactor exhaust emission system, turn the needle(s) outward 14 turn. The outward adjustment of the idle fuel mixture needles is the final adjustment required. On a car without the Therrnactor sys-

tem, turn the needle(s) outward until the engine rpm increases and begins to drop; then turn the idle mixture needle(s) i~ard for maximum rpm

and engine smoothness. The needles should be turned evenly and alternately approximately the same amount. The

final setting may vary about 1/2 turn difference between needles.

If the car is equipped with an auto-

2-10

PART 2 Maintenance Operations

IDt.tAIR ADJUSTING SCREW

82872.,A

Fig. 20-ldle Air Adjusting Screw-

Autolite 4-V (4300)

Fig. J 8-Accelerator Pump Stroke Adjustment-Autolite 4-V (4300)

4. Install the pivot pin retainer. Position the pump rod end into the pump arm and install the retainer.

1. Set the initial idle fuel mixture by turning the idle mixture screws inward (clockwise) until they seat lightly; then, turn the screws outward (counter-

clockwise) llh turns. Do not turn die

screws tightly against their seats as they

may groove the ends. If a needle end is damaged, it must be replaced before a satisfactory fuel mixture can be obtained.

2. Turn the idle by-pass screw inward (clockwise) until it seats lightly; then turn the screw outward (counter-

clockwise) 3lh turns.

CHOKE PLATE\

Final (Hat Engine) Speed

and Mixture Adjustments

Final adjustments are made on the car with the engine running and engine temperatures normalized. Install a tachometer and check engine curb idle speed. Adjust to specifications as

follows :

1. Turn the idle air adjusting screw (Fig. 19) clockwise (inward) to decrease engine rpm and counterclockwise to increase engine rpm.

2. Turn one idle fuel adjusting screw (Fig. 20) clockwise (inward) until the rpm begins to drop (idle lean point). Turn the screw counterclockwise (outward) one-quarter (II.) turn.

3. Repeat step two for the other idle

fuel adjusting screw.

4. Touch up (slightly rotate either

direction) idle adjusting screws for smoothest idle quality. The screws should be within one-eighth (lis) turn of each other.

5. After the correct engine idle mix-

ture has been obtained, check the idle

speed with the trammission selector

lever in neutral and manually opening and closing the throttle. Adjust the

idle speed to specification, if required.

If the car is equipped with an automatic transmission, position the selector lever in drive range to check and adjust the idle speed to specification if necessary.

Gau~ Pin

CHOKE PLATE

SHAFT AND LEVER

../'

BEND LEVE~f:OO

PuLL-UCJfN tLEARAI-K:E

fA~.i)i9~~~

CHOKE CONTROL R~.

Initial Idle Speed and Fuel Mixture Adjustments

It is of utmost importance that the idle fuel system on Autolite 4-V (4300) carburetors be balanced as closely as

possible in order to obtain a satisfactory, stable, idle and fuel miXture adjustment. This is achieved by establishing initial idle speed and miXture adjustments before proceeding with the final idle speed and miXture adjustment, and the fast (cold engine) idle

speed adjustment.

With the air cleaner removed, make

the idle adjustments in the following

sequence:

The idle fuel mixture and idle (hot

engine) speed adjustments for the Autolite 4-V (4300) carburetor are shown in Figs. 19 and 20.

G""fe PIn

APPLY LIGHT

TENSIOOTO

L~VER'

EA,$~ IDJ;.f' ~ APWSTJNGSC.RE~-

AQ~\JST WITI;\ F~ IDLE SPEED SCREW cJt'"«tC1<tJowN $YEP OF FAST IDLE CAM

FAST IDLE

ADJ~TING SCREW

CHOKE LEVER

;}

DLEFfJEL AD"JUSTING SCREWS

82871:-'

82856.A

Fig. 19-1dle Fuel Adjustments. Autolite 4- V (4300)

Fig. 21 -Fast Idle Cam Adjustment-Autolite 4-V (43001

PART 2 2

Maintenance Operations

Fig. 22-Accelerating Pump, Idle Fuel Mixture and Idle (Hot Engine)

Speed Adjustments-Holley Carburetors

The final engine idle speed may be

varied to suit the conditions under whim

tbe car is to be operated.

6. Shut off the engine. Check the

fast (cold engine) idle speed.

Fast (Cold Engine) Idle Speed Adlustment

On a Ford 4-V (4300) carburetor the fast (cold engine) idle adjustment screw location is shown in Fig. 21.

I. Loosen the choke cover so it can rotate. Be sure the thermostatic spring elM! Is engaged in tbe choke lever slot.

2. Rotate the choke cover to a 90-

degree rich position.

3. Position the fast idle speed adjust-

ing screw end to the kickdown step on

the fast idle cam and hold in this position.

4. Check the fast idle cam clearance between the lower edge of the choke plate and the air horn wall.

S. Adjust the fast idle cam clearance to specifications by turning the adjusting screw clockwise to increase the clearance or counterclockwise to decrease the clearance.

6. Install the thermostatic choke cover to the specified index setting and tighten the cover retaining screws.

7. Place the transmission selector

lever in neutral and turn off the en-

gine. Switch off the headlarnps and the

air conditioner (if so equipped). Re-

move the tachometer.

On cars equipped with a vacuum release parking brake, connect the vacuum line to the vacuum power unit of the automatic vacuum release parking brake assembly.

8. If the car is equipped with an automatic transmission, check the antistall dashpot for proper adjustment.

speed adjusting screw (Fig. 22) equally and alternately. Turn the screws inward to increase the speed and outward to decrease the speed. Be sure the fast idle screw is not toudling the fast idle cam when performing this adj~tment.

2. Adjust the idle fuel mixture by turning each idle miJcture screw inward (Figs. 22, 23, or 24) evenly and alternately, starting with the front carburetor and finishing with the rear carburetor, until the engine rpm begins to drop (due to the lean mixture). Turn each screw outward until t~ engine rpm begins to drop (due to the rich mixture); t~n turn each screw inward for maximum engine rpm and smoothness. Always favor. slightly rid! idle

fuel mixture. Final adjustment of the

idle fuel mixture screws should be within lis turn of each other.

3. After the correct engine idle mixture has been obtained, dleck the idle

speed with the transmission selector

lever in neutral and manually opening

and cl~ing the throttle. Adjust the

idle speed to specification, if required.

If the car is equipped with an auto-

matic transmission, position the selec-

tor lever in drive range to check and

adjust the idle speed to specification if necessary.

The final engine idle speed may be varied to suit the cooditions UIMler which the car is to be operated.

4. Shut off the engine. Check the fast

(cold engine) idle speed.

HOLLEY ~V CARBURETOR

Refer to Preliminary PrelNlrBtion-

All Vehicles, above.

Adjust Accelerating Pump Lever

To satisfy acceleration requirements

in various climates, the accelerating pump discharge can be adjusted. The bottom hole (No.2) in the cam pro-

vides a maximum pump discharge for extreme cold weather and the top hole (No.1) provides the minimum pump

discharge for warm weather operation (Fig. 22).

For summer operation, install the

adjustment screw in hole No. I. For winter operation, install the adjust-

ment screw in hole No.2.

On cars equipped with Dual Holley

~ V carburetors, the screw should be int~same hole for each carburetor unit.

Initial Idle Speed and Fuel Mixture Adlustments

The idle fuel mixture is controlled by the idle fuel mixture adjusting screws (needles) located in the primary metering blocks of the carburetors (Figs. 22, 23 or 24). The idle (hot engine) speed adjusting screw location for each carburetor is shown in Fig. 22.

1. Initially set the idle mixture by turning the idle mixture screws inward until they are lightly seated; then turn the screws outward the specified turns. Do not turn the needles tightly against

the seat as this may groove the ends. If

a needle is damaged, it mmt be replaced

before a satisfactory fuel mixture can be obtained.

2. Turn the idle (hot engine) speed screw outward on each carburetor until the throttle plates close tight in the throttle bores. It may be necessary to back the front carburetor fast (cold

engine) idle adjusting screw (Fig. 24) to

close the plates tight in the bores. Set the idle speed adjustment screws to

just make contact with the stops on the carburetor bodies and turn them

inward the specified turns.

Refer to Group 10 of the appro-

priate Shop Manual for specifications.

Final Idle (Hot Engine) Speed and Mixture

Adjustments

1. Adjust the engine idle speed to specifications by turning each idle

2-12

PART 2 - Maintenance Operations

SeCONDARY

CARBURETOR ROO

IDLE MIXTURE SCREW

PRIMARY eARBURETOR

ACCELERATIIK; PlMP

LEVER ADJUSTING SCREW

'SEC(WC)ARY

PRIMARY

: LEVER

carburetor rod so that the hole in the rod at the bellcrank lever just engages the stud on the bellcrank lever (Fig.

23). Install the washers and retainer pins and tighten the locknut on the rod.

7. Open the throttle wide by operating the left side of the bellcrank assembly (on the intake manifold). Be sure the accelerator lever is engaged between the pin and the pad of the accelerator pedal (inside the car). Have someone depress the accelerator to the Roor and while holding the carburetor linkage open, see if the accelerator rod pin will engage the bellcrank lever. Adjust as necessary.

8. Check the idle fuel mixture and idle speed adjustments. Adjust the carburetors as required. Refer to Idle Fuel Mixture and Idle (Hot Engine) Speed Adjustments (in this section) for the proper procedure.

PRNARY

SCREW - BELLCRANK LEVER

PRIMARY THROTTLE LEVER LOCK NUTS

Fig. 23-Holley Dual 4-V Carburetors-Right Side View

82254-A

on the bellcrank lever and on the upper FASf (COLD ENGINE) mLE stud of the front carburetor lever (Fig. SPEED ADJUSTMENT-

23). Tighten the locknut and install t~ AUTOMATIC CHOKE was~ and retainer pins.

The " .dle d. .

last I a JusUng screw con-

4. Move the bellcrank lever so that tacts one edge of the fast idle cam. The the front carburetor throttle is in the cam permits a faster engine idle speed wide open position. Hold in this posi- for smoother running when the engine tion. is cold during choke operation. As t~

S. Install the slotted end of the sec- choke plate is moved through its range ondary carb~retor rod on t~ throttle of t.~vel from the c)osed to the. open lever of the rear carburetor (Fig. 23). posItion, the fast ld~ cam pIck-up

lever rotates t~ fast Idle cam. Each

6. Move the throttle lever of t~ rear position on the fast idle cam permits a carburetor to t~ wide open position; slower idle rpm as engine temperature then, adjust the length of t~ secondary rises and choking is reduced.

SECONDARY DIAPHRAGM PR~RY CARBURETOR .

On the Holley carburetor instaUatiQn, the fast (cold engine) idle speed adjustment is performed on the front (primary) carburetor only. The fast idle speed screw is located on the left side of the front carburetor (Fig. 24).

Refer to Fast (CokJ Engine) Idle Adjustment, below, for correct adjust-

ment procedure.

ADAJSTABLE

OiOICE SYSTEM

HOLLEY DUAL 4-V

CARBUREfOR-

CARBURETOR INTER-

CONNECI1NG UNKAGE

ADJUSTMENf

~ following procedure is required

for adjusting tre inter-carburetor linkage to achieve proper progressive opening of the primary throttle plates to obtain the correct idle speed.

~ secondary throttles are vacuum operated and are inter-connected by a rubber hose, located between the two secondary diaphragm vacuum operating chambers (Fig. 24), to assure synchronous action of tre secondary throttle plates (no adjustment is re-

q uired).

1. With tre air cleaner removed,

disconnect the inter-carburetor link-

age at the front and rear carburetor

~ry throttle levers and at tre bell-

crank lever (Fig. 23). Disconnect tre throttle control cable from the crossshaft beUcrank lever.

2. Adjust the primary carburetor rod

to a 4~6 inch length (Fig. 23) from tre

center line of the hole to the center

line of the bent end (operating centers).

3. Install t~ primary carburetor rod

- -.

IDl..E "X~E

ADJUSTING SCREW

ca.SHAFT ACCELERATOR CABLe

8ELLCRMK LEVER

82m-.

Fig. 24-Holley Dua14-V Corburetors-Left Side View

2-13

PART 2 - Maintenance Operations

obtain a satisfactory idle speed and fuel mixture adjustment. This is achieved by performing initial idle speed and fuel mixture adjustments before proceeding with the final idle speed and fuel mixture adjustments and the fast (cold engine) idle speed

adjustment.

1. Make an initial idle fuel mixture adjustment by turning the idle mixture adjustment screws (Fig. I S) inward

until they lightly touch their seats;

then, back them outward the specified

number of turns. Refer to Group 10 of the Lincoln Shop Manual for specifications. Do not turn the idle fuel mixture adjtfitment screws (needles) tightly

against their seats during tbe adjust-

ment, as this may groove the needle

ends. If a needle is damaged, it must be

replaced to obtain satisfactory fuel mix-

ture adjustlnellts.

2. Make an initial idle speed (air

mixture) adjustment by turning the idle mixture adjustment screws (Fig. 26)

inward until they lightly touch their seats; then, back them outward the specified number of turns. Do DOt turn tbe idle fuel mixture adjustment screws (needles) tightiy agaiMt their seats during the adjustment, as this may groove the needle euds. If a needle is damaged, it must be replaced to obtain satisfactory fuel mixture adjustments.

IDlE 5f'EE[} ADJ'JST'~Er~T "CRI-O

Make certain the idle (hot engine) speed and mixture is adjusted to speciftcatioo before attempting to set the fast idle speed.

1. With the engine operating temperature normalized (hot), air cleaner removed and the tachometer attached, manually rotate the fast idle cam until the fast idle adjusting screw rests adjacent to the shoulder of the highest step (screw aligned with arrow mark) 00 the cam.

2. Start the engine. and turn the fast idle adjusting screw inward or outward as required to obtain the specified idle rpm. (Under conditions specified in Preliminary Preparation-All Vehicles, steps 1 thru 4, above.)

3. Place the transnrission selector lever in neutral and turn off the engine. Switch off the headlamps and the air conditioner (if so equipped). Remove the tachometer.

On cars equipped with a vacuum release parking brake, connect the vacuum line to the vacuum power unit of the automatic vacuum release parking brake assembly.

4. If the car is equipped with an automatic transmission, check the antistall dashpot for proper adjustment.

2.. Turn tlK: fast idle adjusting screw inward or outward (as required) so that tlK: fast idle adjusting screw just contacts tlK: fast idle cam at the index mark to obtain tlK: specified fast idle rpm. (Refer to Group 10 of the appropriate Soop Manual for specifications.)

3. If the car is equipped with an automatic transmission. check the dashpot for proper adjustment.

LINCOLN CARBURETOR (CARTER)

NOTE: The carburetor installed in the Uncoln cars is not the same as in other Ford vehides. The adjt8tment

procedures given below must be used:

With the air cleaner removed. make the idle adjustments in the following

sequence:

Adlust Accelerator Pump Stroke

The accelerator pump stroke adjustment compe~tes for the fuel needs of the engine during extremes of hot or cold temperature. Insert the accelerator pump operating rod into the appropriate hole in the pump arm for the climate in which the car is to be driven

(Fig. 26).

Initial Idle Speed and Mixture Adlustments

The idie fuel system must be balanced as closely as possible in order to

ACCELERATING PUMP

STROKE ADJUS1MENT

FAST (COLD ENGINE) mLE SPEED AD.JUSTMENTMANUAL CHOKE

The adjusting screw on the right side of the carburetor contacts one edge of the choke cam and lever, (Fig. 25). The cam permits a faster engine idle speed for smoother running when the engine is cold during choke operation. As the choke cam and lever is moved through its range of travel from the open to the closed position, the fast idle pick-up lever rotates the throttle shaft.

1. Manually rotate the choke cam and le~ until the fast idle adjusting screw rests on the index mark (arrow) on the cam (Fig. 25).

(,;~Q

HoT

~veR4

FAST IDLE CAM

~ST

PINAL FAST IDLE ADJUSTMENT

82357 .A

Fig. 25-Manual Choke Fast (Cold

Engine) Idle Speed Adjustment

B2644..

fig. 26-ldle fuel Mixture, Idle Speed and Accelerator Pump Stroke-Lincoln

PART 2 - Maintenance Operations

2-14

3. Make an initial idle speed (air mixture) adjustment by turning the idle speed screw inward until it lightly touches its seat; then turn it outward the specified number of turns.

tures) the idle speed adjustment would be incorrect when the idle compensator is in the closed position (normal tem-

peratures).

6. Adjust the engine idle speed

(air mixture) adjustment screw (Fig.

26) to obtain the specified engine idle speed with the transmission lever in

DRIVE position.

7. Turn each idle mixture adjust-

ment screw (Fig. 26) inward, evenly and alternately, until the engine rpm begins to drop, due to the lean mixture. Turn the screws outward, evenly and alternately, until the engine rpm increases and begins to drop. On cars equipped with a Thermactor exhaust emission system, the outward adjustment of the needles is the final adjustment required. On cars without a

Thermactor system, turn the idle fuel mixture screws inward, evenly and alternately, for the maximum idle rpm and engine smoothness. Each idle fuel mixture adjustment screw should have been approximately the same amount.

The final setting may vary 1/2 turn dif-

ference between screws.

8. Check the idle speed adjustment

by placing the transmission selector

lever in NEUTRAL and manually opening and closing the throttle. Position the selector lever in DRIVE range and check the idle speed. Adjust the idle speed to specification, if necessary .

FAST I

ADJUSTIN(

Initial Fast Idle Adiustment

1. Hold the choke plate and the imary throttle shaft fully closed. 1m the fast idle screw outward )unter clockwise) until it clears ~ fast idle cam; then, rotate the ;t idle cam to align the index mark l the cam with the center of the rew end.

2. With the choke plate and throt: shaft still fully closed, turn the rew inward until the end of the

PRIMARY THROTTLE

SHAfT ASSEMBLY

Final Idle (Hot Engine) Speed and Fuel Mixture

Adjustments

The final engine idle speed and fuel mixture adjustments must be made with the engine at a hot, normalized

operating temperature.

Turn the idle fuel mixture screws (Fig. 26) inward to lean the mixture and outward to enrich the mixture. Turn the idle speed (air) adjustment screw (Fig. 26) outward to increase the speed. Conversely, turn the screw inward to decrease the speed. If one of the idle adjustments is changed, the other idle adjustments may be affected. It is necessary that the adjustments be

made in the order listed below and all of the idle adjustments that follow the one being made must be checked:

1. Idle (Hot Engine) Speed Adjust-

ment.

2. Idle Fuel Mixture Adjustment.

3. Fast (Cold Engine) Idle Adjust-

ment.

When setting the engine idle speed and fuel mixture adjustments on a car equipped with an air conditioner, the

air conditioner should be turned off. If

the air conditioner is turned on with the

air cleaner removed, a slightly rough engine idle may be noted. This condition can be disregarded, since the air cleaner traps fuel vapors and allows them to enrich the mixture to again regain a smooth idle.

1. Operate the engine until engine temperatures are stabilized at the normal (hot) operating temperature.

2. Position the transmission lever in

neutral. Allow the throttle to drop back to the normal idle speed position. Remove the vacuum line from the vacuum power unit of the automatic vacuum release parking brake assemblyand plug the vacuum line. It is necessary to inactivate the vacuum power unit to keep the parking brake engaged during the adjustment procedures.

3. Attach a tachometer to the engine.

4. Turn on the head lamps. It is necessary to place the alternator under a load condition in this manner in order to obtain the specified engine idle speed during the adjustment procedure.

5. Place a small weight on the hot

idle compensator spring to hold the compensator closed. If the hot idle compensator was allowed to remain

open (due to high underhood tempera-

B2633.A

f~J~~ cAJA

INDEX MARK

Fig. 27 -Fast Idle Adjustment-Lincoln

The final engine idle speed may be varied to suit the conditions under which the car is to be operated.

9. Check the fast (cold engine) idle

speed for proper adjustment.

The fast idle adjusting screw (Fig.

26) contacts one edge of the fast idle cam. The cam permits a faster engine idle speed when the engine is cold during choke operation. As the choke

plate is moved through its range of

travel from the closed to the open

position, the fast idle cam pick-up lever rotates the fast idle cam. Each position (step) on the fast idle cam permits a slower idle rpm as engine temperature rises and choking is re-

duced.

The final fast (cold engine) idle speed adjmtments must be made with the engine at a hot, normalized, operat-

ing temperature.

pc Tl

(c( tho

fa! 011

SCI tIe

SCREW

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