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Home >> Oldsmobile >> 1989 >> Custom Cruiser >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - 2.8L/3.1L PFI >> Removal & Installation >> Idle Air Control Valve >> Installation

Idle Air Control Valve: Installation

  1. The extended distance of a new IAC must be checked prior to installation. Damage will occur if measurement is incorrect. Distance must not exceed 1 1/8" (28 mm). Measurement should be taken from valve housing flange to end of cone. DO NOT extend or retract pintle on IAC valve which has been in service or damage to internal worm drive may occur.
  2. To retract pintle on new IAC, slowly exert finger pressure on valve.
  3. Install new "O" ring or gasket on valve. Coat "O" ring with oil. Install IAC valve. Tighten IAC valve on 2.8L (VIN S) vehicles to 13 ft. lbs. (18 N.m). On 2.8L (VIN W) and 3.1L equipped vehicles, tighten retaining screws to 30 INCH lbs. (3.39 N.m).
  4. Place the air conditioning controls in the OFF position.
  5. Firmly apply the parking brake and block the drive wheels. Start the engine and shift the transaxle to DRIVE (A/T) or Neutral (M/T). Allow the engine to run until the engine cooling fan has cycled once, or a maximum of 10 minutes.
  6. Turn the ignition switch to the OFF position for at least 5 seconds. Repeat Step 5), then allow the engine to run for at least 5 more minutes.
  7. Install electrical connector. The IAC resets when ignition switch is turned from the "ON" to the "OFF" position. On some models it may be necessary to shift transmission into Drive (auto. trans.) or Neutral (man. trans.) before learning process is complete.
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