Lumina V6-191 3.1L VIN T MFI (1993)
11.
With the engine "OFF," check to see that the accelerator pedal is free: Depress pedal to the floor and release.
12.
Perform the "Idle Learn Procedure." The ECM will need to relearn the IAC valve pintle position following battery reconnect.
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.
^
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.