Removal (5.7L)
WARNING: This page is about a different car, the 2002 Pontiac Firebird and 2002 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
For calibration purposes, several different style Idle Air Control (IAC) valves are used. Ensure replacement valve has the same part number as original valve.
- Disconnect the IAC valve electrical connector. IAC valve is located on side of throttle body. Remove the IAC valve attaching screws. Remove the IAC valve. Remove the IAC valve "O" ring.CAUTION: Do not push or pull on the IAC valve pintle on IAC valves that have been in service. The force required to move the pintle may damage the threads on the worm drive. Do not soak the IAC valve in any liquid cleaner or solvent, as damage may result.
- Clean the IAC valve "O" ring sealing surface, the pintle valve seat, and the air passage. Clean the IAC valve using GM Cleaner (1052626 or GM X-66A). Use a shop towel or use a parts brush in order to remove heavy deposits. If the air passage has heavy deposits, remove the throttle body for complete cleaning.
- Shiny spots on the pintle or seat are normal, and do not indicate misalignment or a bent pintle shaft. Inspect the IAC valve "O"ring for cuts, for cracks, or for distortion. Replace the "O" ring, if the "O" ring is damaged.
CAUTION:
The IAC valve may be damaged if installed with the cone (pintle) extended more than 1.10" (28 mm). Measure the distance that the valve is extended before installing a new valve. The distance from the idle air control valve motor housing to the end of the idle air control valve pintle should be less than 1.10" (28 mm). Manually compress the pintle until the extension is less than 1.10" (28 mm).