Riviera V6-3.8L SC VIN 1 (1995)
Idle Air Control (IAC) Valve: Service and Repair
Throttle Body Assembly
REMOVE OR DISCONNECT
1. Idle Air Control (IAC), Throttle Position (TP) sensor, Mass Air Flow (MAF) sensor, and Exhaust Gas Recirculation (EGR) electrical connectors.
2. Idle air control valve (2) screws.
CAUTION: Before installing new idle air control valve, measure the distance that the valve is extended. Measurement should be made from motor
housing to end of cone. Distance should be no greater than 28 mm (1-1/8 inch). If the cone is extended too far, adjustment is required or damage may
occur to the valve when installed. Adjust IAC by manually compressing the pintle to achieve the correct length.
INSTALL OR CONNECT
1. New idle air control valve to throttle body. Use new O-ring gasket supplied with assembly.
Tighten
IAC valve screws to 3 Nm (27 lb. in.).
2. IAC, TP sensor, MAF sensor, and EGR electrical connectors.
3. The Powertrain Control Module (PCM) will reset the IAC whenever the ignition switch is turned "ON," then "OFF."
4. Start engine and allow engine to reach operating temperature.
