Why do my rpms go up and down while idling?
I drive a 1997 ford Mustang v6, when I'm in idle the rpm guage goes up and down between 1 and the half mark. I know it's not just the guage because the engine clearly is review up and down with it. Should I take it in somewhere?
An idle that goes slowly up & down at idle is called a hunting idle & is a symptom of a vacuum leak.
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