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Home >> Pontiac >> 1998 >> Firebird V8-5.7L VIN G >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Throttle Position Sensor >> Service and Repair >> Idle Learn Procedure >> With Automatic Transmission
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With Automatic Transmission

IDLE LEARN PROCEDURE
Anytime the PCM or the battery is disconnected or the PCM looses power, the PCM's learned position of the IAC valve pintle is lost. The engine idle is unstable when the IAC pintle position is lost. Perform the following procedure in order to return the IAC valve pintle to the correct position:

1. Turn OFF the ignition.
2. Restore the PCM battery feed.
3. Turn OFF the A/C controls.
4. Set the parking brake and block the drive wheels.
5. Start the engine.
6. Shift the transmission selector into the drive range.
7. Allow the engine to idle for 10 minutes.
8. Turn ON the A/C controls.
9. Allow the engine to idle for 10 minutes.
10. Shift the transmission selector into the park range.
11. Allow the engine to idle for 10 minutes.
12. Turn OFF the A/C controls.
13. Allow the engine to idle for 10 minutes.
14. Turn OFF the engine for 30 seconds.
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