GM Firebird 1982-1992 Repair Guide

Idle Air Control Valve



See Figures 1 and 2

  1. Remove the air cleaner.
  3. Detach the electrical connection from the idle air control assembly.
  5. Using a 1 1 / 4 in. wrench, remove the IAC valve from the throttle body. On IAC valves secured with screws, remove the attaching screws.

Before installing a NEW IAC valve, measure the distance that the conical valve is extended. Measurement should be made from the motor housing to the end of the cone. Distance should be no greater than 11/4in. (32mm). If the cone is extended too far, damage may result when the motor is installed. If necessary, push on the end of cone until it is retracted the correct distance.

  1. Installation is the reverse of removal. Torque threaded valves to 13 ft. lbs. (17 Nm).

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Fig. Fig. 1: IAC valve pintle measurement

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Fig. Fig. 2: IAC valve installation