my lumina 2002 ltz engine problem

Asked by fiaz Apr 15, 2014 at 05:44 AM about the 2001 Chevrolet Lumina

Question type: Maintenance & Repair

the engine RPM going up and down position when car is neutral what is the problem and
how can fix it

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DMS74 answered 10 years ago

There could be several causes, but first a better description is needed. How much time elapses between rpm changes...seconds or less...minutes? Also, how drastic are the changes and do they go from what seems like a normal idle to a high idle or to a low idle...or both ways. Does it almost stall at any time? Has this been a one tank of gas problem...it could be as simple as bad gas or a clogging fuel filter.

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burgrat answered 10 years ago

if you don't run the right octane fuel in your car, you could mess the idling sensor up.

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