I recently purchased a used Audi A6 and have noticed that it has a rough idle. The car shakes and vibrates when idling, but runs smoothly while driving. How can I determine the cause of this issue and fix it?
ReplyThe most common cause of a rough idle in an Audi A6 is a faulty or dirty idle control valve. This valve helps regulate the air intake into the engine while idling. Try cleaning or replacing the valve to see if that improves the idle.
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