Idle air control valve location

  • 1994 BUICK REGAL
  • 3.8L
  • V6
  • 2WD
  • 220,000 MILES
Where is the idle air control valve located on the car listed above?
Do you
have the same problem?
Wednesday, June 3rd, 2020 AT 10:45 AM

1 Reply

Good afternoon,

The IAC is on the throttle body. I attached pictures and the procedure for you for the replacement.

Let me know if you have any other questions.



1. Disconnect the idle air control (IAC) valve electrical connector.
2. Remove the IAC valve attaching screws.
3. Remove the IAC valve assembly.

CAUTION: On IAC valves that have been in service, DO NOT push or pull on the old IAC valve pintle. The force required to move the pintle may damage the threads on the worm drive.

4. Clean the IAC valve O-ring sealing surface, pintle valve, seat and air passage.
Use carburetor cleaner and a parts cleaning brush to remove carbon deposits. DO NOT use a cleaner that contains Methyl Ethyl Ketone. It is an extremely strong solvent, and not necessary for this type of deposit.
Shiny spots on the pintle or seat are normal, and do not indicate misalignment or a bent pintle shaft.
If the air passage has heavy deposits, remove the throttle body for complete cleaning.
Inspect the IAC valve O-ring for cuts, cracks or distortion. Replace if damaged.

NOTE: If installing a new IAC valve, be sure to replace with an identical part. IAC valve pintle shape and diameter are designed for specific application.

Idle Air Control Valve
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1. If installing a new IAC valve, measure the distance between the tip of the pintle and the mounting flange.
If greater than 28 mm, use finger pressure to slowly retract the pintle. The force required to retract the pintle of a new valve will not cause damage to the valve.
2. Lubricate the IAC valve O-ring with clean engine oil.
3. Install the IAC valve assembly.
4. Install the IAC valve attaching screws, and tighten to 3.0 Nm (27 in lb).
5. Connect the IAC valve electrical connector.
6. START the engine and allow it to reach operating temperature.

NOTE: No physical adjustment of the IAC valve assembly is required after installation. The IAC valve is reset by the PCM when the ignition is turned ON, and then OFF.
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Wednesday, June 3rd, 2020 AT 12:22 PM

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