1. Disconnect the idle air control (IAC) valve harness connector.



2. Remove the IAC valve attaching fasteners.




Notice: If the 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 the IAC valve in any liquid cleaner or solvent, as damage may result.

3. Remove the IAC valve assembly.
4. Remove the O-ring.
5. Clean the IAC valve O-ring sealing surface, the pintle valve seat, and the air passage.

•	Use carburetor cleaner and a parts cleaning brush in order to remove carbon deposits. Follow instructions on the 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. They do not indicate misalignment or a bent pintle shaft.

•	If air passage has heavy deposits, remove the throttle body for a complete cleaning. Refer to Throttle Body Assembly Replacement .

6. Inspect the IAC valve O-ring for cuts, cracks, or distortion. Replace if damaged.

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

1. Measure the distance between tip of IAC valve pintle and mounting flange.

If more than 28 mm, use finger pressure in order to slowly retract the pintle. The force required to retract the pintle of a new valve will not cause damage to the valve.




2. Lubricate the IAC valve O-ring with clean engine oil.
3. Install the IAC valve assembly.




Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Install the IAC valve attaching fasteners.

Tighten
Tighten the IAC valve attaching fasteners to 3.0 N·m (26 lb in.).




5. Connect the IAC valve harness connector.
6. Reset the IAC valve pintle position.

Without Scan Tool

1. Start the engine for 20 seconds.
2. Turn OFF the ignition for 10 seconds.
3. Start the engine.
4. Inspect for the proper idle speed.

With Scan Tool

1. Connect the scan tool to the data link connector (DLC).
2. Turn ON the ignition, with the engine OFF.
3. Use the scan tool in order to select the IAC Reset in Special Functions.
4. Activate the reset function and wait for the IAC counter to stop.
5. Start the engine.
6. Inspect for proper idle speed.