Idle Speed/Throttle Actuator - Electronic: Service and Repair

Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the air intake resonator.
3. Disconnect the idle air control (IAC) valve connector.
4. Remove the IAC valve retaining bolts.

NOTE: On IAC valves that have been in service, do not push on the valve pintle. The force required to move the pintle may damage the threads on the worm drive.

5. Remove the IAC valve.

NOTE: Do not use methyl ethyl ketone because it can damage the parts.

6. Clean the IAC valve O-ring seal area, the pintle valve seat, and the air passage with a suitable fuel system cleaner.


Installation Procedure






Important: If installing a new IAC valve, be sure to replace it with an identical part. The IAC valve pintle shape and diameter are designed for the specific application. Measure the distance between the tip of the IAC valve pintle and the mounting flange. If the distance is greater than 1.1 inches (28 mm), use finger pressure to slowly retract the pintle. The force required to retract the pintle will not damage the IAC valve. The purpose of the 1.1 - inch (28 - mm) setting is to prevent the IAC pintle from bottoming out on the pintle seat. This 1.1 - inch (28 mm) setting is also an adequate setting for controlled idle on a restart.

1. Lubricate a new O-ring with engine oil. Install the new O-ring onto the valve.
2. Install the IAC valve into the throttle body.




3. Install the IAC valve retaining bolts.

Tighten
Tighten the idle air control valve retaining bolts to 27 lb-in (3 N.m).

4. Connect the IAC valve connector.
5. Install the air intake resonator.
6. Connect the negative battery cable.
7. Start the engine and check for the proper idle speed.