Regal V6-191 3.1L (1991)
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If the air passage has heavy deposits, remove the throttle body for complete cleaning.
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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.
INSTALLATION:
1.
If installing a new IAC valve, measure the distance between the tip of the pintle and the mounting flange.
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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 3.4 Nm (30 lb.in).
5.
Connect the IAC valve electrical connector.
6.
START the engine and allow it to reach operating temperature.
IDLE LEARN PROCEDURE: Any time the battery is disconnected, the programmed position of the IAC valve pintle is lost, and replaced with a
default value. To return the IAC valve pintle to the correct position, perform the following procedure:
1.
After restoring battery power, connect the Tech 1 "Scan" tool.
2.
Select "IAC System," then select "Idle Learn" in the "Misc. Test" mode.
3.
Proceed with idle learn as directed.
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This procedure allows the ECM memory to be updated with the correct IAC valve pintle position, for the vehicle, and provide a stable idle
speed.
