I recently purchased a used Audi 80 and noticed it has a rough idle. The engine seems to shake and vibrate more than it should when idling. I checked the spark plugs and air filter, but they seem to be in good condition. What could be causing this issue?
ReplyIt is possible that the rough idle is caused by a dirty or faulty idle air control valve (IACV). This valve controls the amount of air entering the engine while idling and can become dirty over time, affecting its performance.
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