Rough, Unstable, or Incorrect Idle and Stalling

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DEFINITION: The engine runs unevenly at idle. If bad enough, the vehicle may shake. Also, the idle may vary in RPM (called hunting). Either condition may be bad enough to cause stalling. Engine idles at incorrect speed.

Misfire Counts

Check misfire counts using a scan tool (if a...

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Document Title: Rough, Unstable, or Incorrect Idle and Stalling

engine

idle

check

scan

tool

throttle

valve

fuel

wires

throttle position sensor

term fuel trim

fuel trim values