Idle air valve location (4-cylinder models)
Idle air valve location (6-cylinder models)
The air valve controls the air supply to the engine at idle, thus regulating the idle speed.
Examination
1. Connect a tachometer. Start the engine and raise the RPM to 3000. Wait for the radiator cooling fan to come on and measure the engine idle speed (all electrical equipment of the car must be turned off). If the idle speed is too low, disconnect the air valve connector. The engine speed should begin to fluctuate after the valve connector is disconnected. If not, the valve is probably bad.
2. Measure the resistance between the valve terminals. It should be 7.7-9.3 ohms (four-cylinder models), 10.7-12.3 ohms (1993-1997 six-cylinder models) or 8.7-10.5 ohms (1998 six-cylinder models). Replace valve if necessary.
Replacement
1. Disconnect the valve connector, unscrew the fixing screws and remove the valve.
2. Installation is carried out in the reverse order of removal. Replace valve o-ring.