Why is my Audi 80 engine making a knocking sound?

I recently noticed that my Audi 80's engine started making a knocking sound while idling. I'm not sure what could be causing this and I'm worried it could be a sign of a bigger issue. Can you provide some insight on what could be causing this and how to fix it?

It's possible that the knocking sound could be due to low oil levels or worn out engine bearings. I would recommend checking your oil levels and if they are low, topping it off. If that doesn't solve the issue, it's best to take your car to a mechanic for further inspection.

Another potential cause for the knocking sound could be a faulty fuel injector. If the injector is clogged or not functioning correctly, it can cause a knocking sound in the engine. It's best to have a professional inspect and possibly replace the fuel injector.

I had the same issue with my Audi 80. After taking it to the mechanic, they discovered that the spark plugs needed to be replaced. Once that was done, the knocking sound disappeared. I suggest checking and replacing your spark plugs if necessary.