Idle Air Control (IAC) Valve Replacement

REMOVE OR DISCONNECT:

1. Electrical connector from IAC valve.
2. IAC valve attaching screws.
3. IAC valve assembly.

NOTE: If IAC valve has been in service: DO NOT push or pull on the IAC valve pintle. The force required to move the pintle may damage the threads on the worm drive. Also, DO NOT soak IAC valve in any liquid cleaner or solvent, as damage may result.

CLEAN AND INSPECT:

- Clean IAC valve O-ring sealing surface, pintle valve seat and air passage.
- Use carburetor cleaner and a parts cleaning brush to remove carbon deposits. Follow instructions on container. DO NOT use a cleaner that contains methyl ethyl ketone, an extremely strong solvent, and not necessary for this type of deposit.
- Shiny spots on the pintle or seat are normal, and DO NOT indicate misalignment or a bent pintle shaft.
- If air passage has heavy deposits, remove throttle body for complete cleaning.
- Inspect IAC valve O-ring for cuts, cracks or distortion. Replace if damaged.

IMPORTANT: If installing a new IAC valve, be sure to replace with an identical part. IAC valve pintle shape and diameter are designed for the specific application.

- Measure the distance between tip of IAC valve pintle and mounting flange. If greater than 28 mm, use ringer pressure to slowly retract the pintle. The force required to retract the pintle of a new valve will not cause damage to the valve.

INSTALL OR CONNECT:

1. Lubricate IAC valve O-ring with clean engine oil.
2. IAC valve assembly.
3. Attaching screws. Tighten IAC valve attaching screws to 3.4 Nm (30 in lb).
4. Electrical connector.
5. Reset IAC valve pintle position:
a. Turn ignition "ON" for five seconds.
b. Turn ignition "OFF" for ten seconds.
c. Start engine, check for proper idle operation.