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Why does my Audi A4 idle rough upon startup?

I noticed that my Audi A4 idles roughly for about 10-15 seconds upon startup, then smooths out. Has anyone else experienced this issue and have any recommendations for a fix?

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Answers (2)

This issue is commonly caused by carbon buildup in the throttle body. I suggest having it professionally cleaned to improve idle performance.

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I've heard that changing the spark plugs can also improve rough idle on the A4. It might be worth checking and replacing those if necessary.

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