Auxiliary Air Valve (Idle Speed): Service and Repair

Idle Air Control (IAC) Valve:

REMOVAL
1. Disconnect battery ground cable.

NOTE: When battery voltage is removed from the Powertrain Control Module (PCM), all learned values will be cleared and reset to predetermined values. When battery voltage is restored to the PCM, the vehicle may exhibit certain driveability concerns. It will be necessary to drive the vehicle to allow the PCM to relearn values for optimum driveablilty and performance.


2. Raise vehicle on hoist.
3. Disconnect the engine control sensor wiring or fuel charging wiring from the Idle Air Control (IAC) valve at the connector.
4. Remove the IAC valve retaining bolts or stud bolt.
5. Remove the IAC valve and gasket.

INSTALLATION

NOTE: If scraping is necessary, be careful not to damage IAC valve or intake manifold gasket surfaces or drop material into intake manifold.

1. Clean IAC valve gasket mating surfaces.
2. To install IAC valve, reverse removal procedure.
3. Tighten the IAC valve retaining bolts to 8-11 N.m (71-97 lb-in).