Cold Fast Idle Too High (MIL Works OK, No DTCs Set)

Cold fast idle too high (MIL works OK, no DTCs set)

Cold fast idle too high
(MIL works OK, no DTCs set)

Do the ECM/PCM idle learn procedure ECM/PCM Idle Learn Procedure.

Check the idle speed Testing and Inspection.

Do the throttle position learning check Testing and Inspection.

Also check for

Intake vacuum leaks

Also check for

Incorrect valve adjustment