I have noticed that my Audi 80's engine seems to be revving up and down while idling. This is concerning to me as it has not happened before. What could be causing this issue and how can I fix it?
ReplyThe most common cause of this issue is a dirty or faulty idle air control valve. This valve helps regulate the amount of air entering the engine while idling. I would recommend cleaning or replacing this valve to see if it resolves the problem.
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