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Home >> Oldsmobile >> 1994 >> Bravada >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System >> Idle Air Control (IAC) Motor >> Installation

Idle Air Control (IAC) Motor: Installation

  1. Inspect "O" ring for damage. Replace if necessary. If reusing IAC motor, DO NOT  push or pull on pintle. Threads on worm gear will be damaged.
  2. If replacing IAC motor, measure distance between tip of new IAC motor pintle and mounting flange. Distance should not exceed 1 1/8" (28 mm). If distance is greater than specified, use finger pressure to slowly retract pintle. Lubricate "O" ring with clean engine oil.
  3. Apply thread locking compound (Loctite 262) to IAC motor retaining screw threads. Install IAC motor to throttle body. Tighten IAC retaining screws to 30 INCH lbs. (3 N.m). Connect IAC harness connector.
  4. To reset IAC motor pintle position, turn ignition on for 5 seconds. Turn ignition off for 10 seconds. Start engine and check for proper idle operation. Repeat IAC resetting procedure if proper idle operation cannot be obtained.


  1. Inspect gasket or "O" ring for damage. Replace if necessary. Measure distance from IAC contact flange to tip of pintle. Distance should not exceed 1 1/8" (28 mm). If valve is extended too far, damage to valve will result during installation.
  2. To set IAC pintle length on new IAC, use finger pressure to slowly retract pintle. Lubricate NEW "O" ring with ATF and install NEW gasket. Install IAC motor on throttle body. Tighten IAC valve to specification. See TORQUE SPECIFICATIONS  .
    CAUTION: DO NOT  extend or retract pintle if IAC has been in service, or damage to worm gear will result.
  3. Connect electrical lead to IAC motor and install air cleaner. Start engine and allow it to reach normal operating temperature. Drive vehicle. It may be necessary to reset idle speed. To reset, disconnect battery cable for 10 seconds and reconnect. Cycle ignition on with engine off for 5 seconds. Turn ignition off for 10 seconds and restart vehicle. Proper idle will be initialized.
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