Rough, Unstable, or Incorrect Idle, Stalling

Steps 1 - 10:

Steps 11 - 22:

Steps 23 - 28:

Definition: The engine runs unevenly at idle. If the condition is bad enough, the vehicle may shake. Also, the idle varies in rpm (called "hunting"). Either condition may be severe enough to cause stalling. The engine idles at incorrect idle speed.

Important: Before diagnosing the symptom, check service bulletins for updates.