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Audi 80 - How to troubleshoot engine knocking?

I recently started hearing a knocking noise coming from my Audi 80's engine. What could be causing this and how can I fix it?

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M

One possible cause of engine knocking in an Audi 80 could be low quality fuel. Make sure to use premium gasoline and try using a fuel additive to clean the engine.

C

Another possible cause of engine knocking could be worn out spark plugs. Make sure to replace them regularly to prevent knocking and improve engine performance.

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