Idle Speed/Throttle Actuator - Electronic: Service and Repair

Removal

1. Disconnect IAC valve electrical connector.
2. Remove IAC valve attaching screws, if equipped then the valve using a suitable 1-1/4 inch wrench and discard gasket.

Fig. 356 Typical IAC valve installation:

Installation

Prior to installation, identify IAC valve as being either Type 1 or Type 2, Fig. 356. If dimension ``A'' is greater than 1-1/8 inch, reduce as follows:
On Type 1, exert a firm pressure on conical valve to retract it.
On Type 2, while turning valve in clockwise rotation, compress retaining spring from conical valve. Return spring to original position with straight part of spring end aligned with flat surface of valve.
1. Install IAC valve in throttle body using new gasket. Torque IAC valve to 13 ft. lbs.
2. Connect IAC valve electrical connector.
3. Start engine and allow to reach operating temperature.
4. On 4-110 (1.8L) and 4-122 (2.0L) Turbo engines, IAC valve will reset idle speed when vehicle is driven at 30 MPH. On V6-181 (3.0L) and V6-231 (3.8L) engines, ECM will reset idle speed when ignition is turned On, then Off. On V6-173 (2.8L) and V8 engines, the ECM will reset the valve when the engine is started, then the ignition is switched off.