Airaid 400-109 Installation Instructions

#13

#15

#5

#14

#2

#13

#7

#10

#9

#3

#17

#4

#8

#6

#10

#16

OEM Mass Air Flow Sensor

#11

#8

#12

#1

Installation Instructions

For Part Numbers:

400-109 700-420 Airaid Oiled Media Filter
401-109 701-420 SynthaMax Dry Media Filter - Red
402-109 702-420 SynthaMax Dry Media Filter - Black
403-109 703-420 SynthaMax Dry Media Filter - Blue

1997- 04 Expedition 4.6, 5.4L
1997- 03 F-150 4.6, 5.4L
2004 F-150 4.6, 5.4L “Heritage” (16 valve)
*Black Tube

Component Identification

1. Airaid Premium Filter 1

2. Airaid Intake Tube 1

3. MAF Bracket 1

4. Urethane Hump Hose 1

5. Urethane Reducer Hose 1

6. 5/8” x 18” Breather Hose 1

7. 3/4” x 12” L-Hose 1

8. 1/4- 20x 7/8” Hex Bolts 6

9. 1/4” Flat Washer 4

10. 1/4- 20” Nylock Nuts 6

11. MAF Gasket 1

12. MAF Backing Plate 1

13. #60 Hose Clamp 3

14. #52 Hose Clamp 1

15. 7/16” Rubber Grommet 1

16. Black Speed Clamp 2

17. Black Speed Clamp 2

1. Disconnect the negative battery cable.

Using a 10mm socket, remove the three bolts secur­ing the engine beauty cover, remove the cover, and
set it aside (save the bolts and cover for reuse).

4. ) Remove the factory intake tube, and set it aside.
Remove the AIT sensor from the tube by carefully
prying it out with a flat blade screwdriver (save the
sensor for reuse). Disconnect the Mass Air Flow
(MAF) sensor wir in g harness from the main en­gine wiring harness.

2. Loosen the hose clamps at the throttle body,
and air filter housing outlet.

5. The factory airbox assembly is held in place by
rubber grommets (it is a “pull to release fit.”). Re­move the assembly and grommets from the engine
compartment. Unlatch the airbox and separate the
two sections. Remove the wire loom from the
MAF sensor wir ing harness, then slide t he
grommet away from the connector.

3. Remove the crankcase breather hose from the
factory intake tube and the valve cover. Discon­nect the Air Intake Temperature (AIT) sensor
wiring harness from the sensor. (4.6L Engine

only: Disconnect the Idle Air Bypass Valve
(IABV) inlet tube from the factory intake tube.)
(5.4L Engine only: disconnect the IABV, save the
plastic hose for reuse.)

Disconnect the MAF
sensor wiring harness
located inside the air­box.

6. Locate the notch on the flat side of the airbox

and gently pry it up. Disconnect the MAF sensor
wiring harness from the sensor (inside the air­box).

7. Using a 10mm socket, remove the four MAF
sensor mounting nuts. Carefully remove the MAF
sensor and the wiring harness from the airbox, (save
them for reuse).

8. Mount the MAF sensor to the MAF bracket
(#3) using four 1/4-20x 7/8” hex bolts (#8), 1/4­20” nylock nuts (#10), and the MAF gasket
(#11). Mount the bracket and sensor to the facto­ry location, using the MAF backing plate (#12),
two 1/4-20x 7/8” hex bolts (#8), four 1/4” flat
washers (#9), and two 1/4- 20” nylock nuts
(#10). (Leave the MAF bracket loose for now).

9. Reconnect the MAF sensor wiring harness to
the sensor, and to the main engine wiring har­ness. Install the urethane hump hose (#4) onto
the MAF sensor, with two #60 hose clamps
(#13). Tighten only the clamp on the sensor.

10. Install the small side of the urethane reducer
hose (#5) onto the throttle body using one #52
hose clamp (#14). Install one #60 hose clamp
(#13) onto the larger side of the reducer hose.
Tighten only the clamp on the throttle body.

Slide the L hose over
the factory plastic

IABV hose.

11. Install the 7/16” rubber grommet (#15) into

the Airaid Intake Tube (#2). Insert the factory
AIT sensor into the grommet . Slip the Air aid
Intake Tube into the urethane hump and reducer
hoses. Align for best fit and tighten the remain­ing hose clamps. Tighten the MAF bracket and
reconnect the AIT sensor wiring harness.

12. Install the 5/8”X18” breather hose (#6) onto the
valve cover breather fitting then onto the Airaid In­take Tube nipple. Secure the hose using two #19
speed clamps (#16).

13. 5.4L engines: Measure and cut the 3/4 x 12”
L-hose (#7) as needed, then slide it over the fac-

tory plastic IABV hose. Install the hose onto the
Airaid Intake Tube nipple and secure it using two
#22 speed clamps (#17).

14. 4.6L engines: Rotate the IABV inlet tube 90
degrees to provide clearance for the 3/4 x 12” L­hose (#7).

15. 4.6L engines continued: Connect the Airaid
Intake Tube nipple to the IABV inlet tube using
the 3/4 x 1/2” L-hose (#7), and two #22 speed
clamps (#17).

17. Double check your work!

Make sure there is no foreign material in the intake path. Make sure all clamps, hoses, bolts,
and screws are tight.

18. Reconnect the negative battery cable!

16. Install the Airaid Premium Filter (#1) onto the

MAF bracket, and tighten the clamp. Reinstall the
beauty cover using the three factory bolts.

Full color instructions can be viewed on our web site at Airaid.com. Use the Product Search function to find your part number, and click View Details.

Thank you for purchasing the Airaid Intake System. Contact Airaid @ [phone] 8:00 AM - 5:00 PM MST weekdays for questions regarding fit or instructions
that are not clear to you. Your Airaid Intake System was carefully inspected and packaged. Check that no parts are missing, or were damaged during shipping. If any parts are
missing, contact Airaid. The air filter element is protected from direct exposure to water and debris; care should be taken not to drive through deep water. WATER INGESTION
IS THE DRIVERS RESPONSIBILTY! The air filter is reusable and should be cleaned periodically.

FILTER IDENTIFICATION

700-420 Airaid Oiled Media 701-420 Airaid SynthaMax Dry Media - Red

702-420 Airaid SynthaMax Dry Media - Black 703-420 Airaid SynthaMax Dry Media - Blue

For your Oiled media filter we suggest
using the AIRAID Filter Tune-Up Kit!

Synthamax Air Filters do not require oil.
Service air filter as needed by cleaning
with common non-petroleum all-purpose
household cleaner and water. Simple
Green®, Formula 409® or equivalent
works great. Apply cleaner to outside of
air filter and allow to soak. Then flush
filter clean from the inside out with a gar­den hose and repeat steps if necessary.
Do not apply high pressure water or air
to clean filter. Allow filter to air dry and

P/N 790-551 Aerosol Spray

reinstall.

P/N 790-550 Squeeze Spray

Airaid Filter Co. 2688 E Rose Garden Ln. Phoenix AZ 85050 [phone] [e-mail] www.airaid.com

REV.10.18.13