Suzuki Swift 1993 User Manual

D - ADJUSTMENTS

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1993 Suzuki Swift

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ARTICLE BEGINNING

Thursday, April 08, 1999 09:26AM

1993 ENGINE PERFORMANCE Suzuki of America Corp. On-Vehicle Adjustments

Suzuki; Samurai, Sidekick, Swift

ENGINE MECHANICAL

Before performing any on-vehicle adjustments to fuel or ignition system, ensure engine mechanical condition is okay.

VALVE CLEARANCE

NOTE: Swift DOHC uses hydraulic lifters. No adjustments are required.

Samurai & Sidekick

1) Remove valve cover. Rotate engine until zero degree (TDC) timing mark of timing belt cover is in line with timing mark on crankshaft pulley. See Fig. 1.

2) Ensure cylinder No. 1 is at TDC on compression stroke. Remove distributor cap. On Samurai and Sidekick (TBI), ensure rotor is pointed upward at distributor hold-down bolt and to No. 1 terminal of distributor cap. On Sidekick (MPI), ensure rotor is at about 1 o’clock position and pointed to No. 1 terminal of distributor cap. If rotor is not as described, rotate crankshaft 360 degrees.

3) Measure valve clearance between adjustment screw and valve stem using shim thickness gauge. Check intake valve clearance of cylinders No. 1 and 2 and exhaust valve clearance of cylinders No. 1and 3. See VALVE CLEARANCE SPECIFICATIONS table.

4) Turn crankshaft one complete revolution (360 degrees). Check intake valve clearance of cylinders No. 3 and 4 and exhaust valve clearance of cylinders No. 2 and 4.

5) Adjust valves by loosening lock nut and turning adjusting screw until clearance is as specified. After adjusting clearance, tighten adjusting screw lock nut to 11.0-13.5 ft. lbs. (15-18 N.m) for Samurai or 90-108 INCH lbs. (10-13 N.m) on Sidekick. On all models, recheck clearance.

VALVE CLEARANCE SPECIFICATIONS TABLE

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Application In. (mm)

Samurai, Sidekick (TBI) & Swift SOHC Engine Cold

Intake ........................................ .005-.007 (.13-.18)

Exhaust ....................................... .006-.008 (.15-.20)

Engine Hot

Intake ........................................ .009-.011 (.23-.28)

Exhaust ....................................... .010-.012 (.25-.30)

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Sidekick (MPI) Engine Cold

Intake & Exhaust .............................. .003-.005 (.08-.12)

Engine Hot

Intake & Exhaust .............................. .005-.006 (.12-.16)

Swift DOHC ..................................................... (1)

(1) - Hydraulic valve lash adjusters are used and no adjustment is required.

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Swift SOHC

1) Remove valve cover. Remove right inner fender apron extension to enable timing marks to be seen. Align crankshaft pulley timing mark with TDC mark on timing belt cover. See Fig. 1.

2) Remove distributor cap. Ensure rotor is pointing upward toward distributor hold-down bolt and to No. 1 terminal of distributor cap. If rotor is not as described, rotate crankshaft 360 degrees.

3) Measure valve clearance between adjustment screw and valve stem using shim thickness gauge. Check intake valve clearance of cylinders No. 1 and 2 and exhaust valve clearance of cylinders No. 1and 3. See VALVE CLEARANCE SPECIFICATIONS table. Turn crankshaft one complete revolution (360 degrees). Check intake valve clearance of cylinders No. 3 and 4 and exhaust valve clearance of cylinders No. 2 and 4.

4) Adjust valves by loosening lock nut and turning adjusting screw until clearance is as specified. Hold adjusting screw while tightening lock nut to 11.0-13.5 ft. lbs. (15-18 N.m). Recheck clearance.

IGNITION TIMING

NOTE: Verify that increasing engine speed advances ignition timing.

Samurai & Sidekick

1) Ensure transmission is in Neutral or Park and parking brake is set. Inspect crankshaft pulley timing mark and timing mark indicator on timing belt cover. See Fig. 1. Clean marks as required. Start engine, and warm it to normal operating temperature. Turn engine off with ignition on for 5 seconds. Restart engine. Run engine at 2000 RPM for 5 minutes, and then return it to idle. Turn all accessories off. Attach timing light to No. 1 spark plug wire. Ensure idle speed is correct. See IDLE SPEED SPECIFICATIONS table under IDLE SPEED & MIXTURE.

CAUTION: Driving with jumper wire installed in monitor coupler will damage catalytic converter.

2) Remove protective cap from monitor coupler located next to battery. Connect jumper wire between terminals "C" (ground) and "D" (test switch). See Fig. 2. Aim timing light at crankshaft pulley and timing cover timing marks. If ignition timing is not within

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1993 Suzuki Swift

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specification, loosen distributor hold-down flange bolts, and rotate distributor to obtain correct ignition timing. See IGNITION TIMING table. Tighten distributor hold-down flange bolts, and recheck ignition timing.

NOTE: With jumper wire installed, timing should be fixed. If timing varies, terminal "D" is not properly grounded.

3) Remove jumper wire from monitor coupler. Ensure ignition timing advances as engine speed increases. If ignition timing does not advance, check TPS, monitor coupler wiring circuit, engine start signal circuit and ECM.

Fig. 1: Locating Ignition Timing Mark Courtesy of Suzuki of America Corp.

Fig. 2: Identifying Monitor Coupler Terminals (Samurai & Sidekick) Courtesy of Suzuki of America Corp.

IGNITION TIMING TABLE (Degrees BTDC @ RPM) (1)

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Application Man. Trans. Auto. Trans.

Samurai .................. (2) 7-9 @ 800 ................ Not Used

Sidekick

MPI ..................... (2) 4-6 @ 800 ........... (2) 4-6 @ 800

TBI ..................... (2) 7-9 @ 800 ........... (2) 7-9 @ 800

Swift

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DOHC ................. (3) 5-7 @ 800-900 ..... (3) 5-7 @ 800-900

SOHC .................... (3) 4-6 @ 750 ........... (3) 4-6 @ 850

(1) - See Fig. 1 for timing mark location. (2) - With jumper wire installed between "C" and "D" terminals of monitor coupler connector, located near battery. See Fig. 2. (3) - With jumper wire installed between "D" and "E" terminals of monitor coupler connector, located near ignition coil. See Fig. 3.

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Swift

1) Ensure transmission is in Neutral or Park. Set parking brake. Inspect crankshaft pulley timing mark and timing mark indicator on timing belt cover. See Fig. 1. Clean marks as required. Start engine, and warm it to normal operating temperature. Turn all accessories off. Attach timing light to No. 1 spark plug wire. Ensure idle speed is correct. See IDLE SPEED SPECIFICATIONS table under IDLE SPEED & MIXTURE.

CAUTION: Driving with jumper wire installed in monitor coupler will damage catalytic converter.

2) Connect terminals "D" (ground) and "E" (test switch) of monitor coupler. See Fig. 3. Aim timing light at crankshaft pulley and timing cover timing marks. If ignition timing is not within specification, loosen distributor hold-down bolt and rotate distributor to obtain correct ignition timing. See IGNITION TIMING table. Tighten distributor hold-down bolt, and recheck ignition timing.

Fig. 3: Identifying Monitor Coupler Terminals (Swift) Courtesy of Suzuki of America Corp.

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PICK-UP COIL AIR GAP

Thursday, April 08, 1999 09:26AM

1) Remove distributor cap and rotor. Using non-magnetic shim thickness gauge, measure air gap between reluctor tooth and pick-up coil. See PICK-UP COIL AIR GAP table. If adjustment is required, loosen pick-up coil plate hold-down screws.

2) Using blade screwdriver, move pick-up coil plate to adjust air gap to specification. See PICK-UP COIL AIR GAP table. Tighten screws, and recheck air gap. Ensure no metal particles are on pick-up coil tooth.

PICK-UP COIL AIR GAP TABLE

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Application In. (mm)

Samurai ........................................................ (1)

Sidekick ....................................................... (1)

Swift

DOHC (2) ...................................... .008-.012 (.20-.30)

SOHC ................................................... .008 (.20)

(1) - Not adjustable. (2) - Also referred to as crank angle sensor air gap.

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IDLE SPEED & MIXTURE

NOTE: Mixture is not adjustable. Mixture is controlled by ECM from various sensor inputs.

COLD (FAST) IDLE

NOTE: Cold start or fast idle speed is not adjustable. Air valve operation supplies by-pass air for cold starting.

IDLE SPEED

NOTE: DO NOT adjust idle speed in areas above 8200 ft. elevation.

Samurai

1) Start engine, and warm it to normal operating temperature. Install spare fuse into diagnosis terminal of fuse box, and ensure Malfunction Indicator Light (MIL) indicates Code 12. See Fig. 4.

2) Turn engine off. Connect Duty Meter (99963-00006) to monitor coupler duty check terminal "A" and ground terminal "C". See Fig. 2. Test connector is located near battery. Turn ignition on, and wait 5 seconds.

3) Start engine, run it at 2000 RPM for 5 minutes and then return it to idle. Using duty meter, ensure idle speed and IAC duty percentage are within specification. See IDLE SPEED SPECIFICATIONS and IAC DUTY AT SPECIFIED IDLE SPEED tables. If idle speed and/or IAC duty percentage require adjustment, remove idle speed adjusting screw

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1993 Suzuki Swift

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protective cap on throttle body. To adjust idle speed, turn adjusting screw. See Fig. 5.

4) When idle speed and IAC duty percentage are within specification and vehicle is equipped with A/C, go to step 5). If vehicle is not equipped with A/C, reinstall idle speed adjusting screw protective cap to throttle body. Remove duty meter from monitor coupler, and rein-stall cap. Remove spare fuse from diagnosis terminal of fuse box.

5) Turn A/C on, and set fan switch to LOW position. Check idle speed and IAC duty percentage. If idle speed and/or IAC duty percentage is not within specification, turn A/C VSV adjusting screw to adjust idle. See Fig. 6.

Fig. 4: Installing Diagnosis Terminal Fuse (Samurai) Courtesy of Suzuki of America Corp.

Fig. 5: Locating Idle Speed Adjusting Screw (Typical) Courtesy of Suzuki of America Corp.