Rough, Unstable, or Incorrect Idle, Stalling

SYMPTOM DESCRIPTION:

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 severe enough to cause stalling. Engine idles at incorrect speed.






POSSIBLE CAUSE ACTION

Low idle speed out of ^ Adjust low idle speed.
adjustment





Injection pump malfunction ^ If injection pump is malfunctioning
or will not adjust properly, replace as
a unit.