Mechanics

PONTIAC GRAND AM ENGINE PROBLEM

1998 Pontiac Grand Am • 140,000 miles

How do I reset the idle after putting new head gaskets in?
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Guest
October 24, 2012.



-Keep driving it till it relearns itself except 5.7L

Idle Learn Procedure (5.7L)

Idle learn procedure must be performed to provide proper positioning of Idle Air Control (IAC) valve to obtain proper engine idle. If idle learn procedure is not performed, engine idle may become unstable. Procedure must be performed if any of the following have been done: Vehicle battery was disconnected.
PCM was disconnected or PCM looses battery voltage.
On A/T models, go to next step. On M/T models, go to step 5).
On A/T models, ensure ignition is off. Restore battery voltage to PCM. Ensure A/C is turned off. Apply parking brake. Block rear wheels. Start engine.
Place transmission in Drive. Allow engine to idle for 10 minutes. Turn A/C on. Allow engine to idle for 10 minutes. Place transmission in Park.
Allow engine to idle for 10 minutes. Turn A/C off. Allow engine to idle for 10 minutes. Shut engine off for 30 seconds. Clear Diagnostic Trouble Codes (DTCs) from PCM. Perform powertrain On-Board Diagnostic (OBD) system check. See POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK in the appropriate TESTS W/CODES article in ENGINE PERFORMANCE. Ensure engine is idling for one minute before checking for DTCs when performing powertrain OBD system check.
On M/T models, ensure ignition is off. Restore battery voltage to PCM. Ensure A/C is turned off. Apply parking brake. Block rear wheels. Place transmission in Neutral.
Start engine. Turn A/C on. Allow engine to idle for 10 minutes. Turn A/C off. Allow engine to idle for 10 minutes.
Shut engine off for 30 seconds. Clear Diagnostic Trouble Codes (DTCs) from PCM. Perform powertrain On-Board Diagnostic (OBD) system check. See POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK in the appropriate TESTS W/CODES article in ENGINE PERFORMANCE. Ensure engine is idling for one minute before checking for DTCs when performing powertrain OBD system check.

Rasmataz
Oct 24, 2012.