How can I troubleshoot my Audi 80's engine knocking noise?

I have noticed a knocking noise coming from my Audi 80's engine. It doesn't happen all the time, but when it does, it's quite loud and concerning. What could be causing this and how can I fix it?

The knocking noise in your Audi 80's engine could be caused by a few different issues. It's important to first check the oil level and quality, as low or dirty oil can lead to engine knocking. If that's not the issue, it could be a sign of worn out piston bearings or a loose connecting rod. I recommend taking your car to a trusted mechanic for a thorough inspection and repair.

Another possible cause of the knocking noise in your Audi 80 could be a malfunctioning fuel injector. This can cause an imbalance in the combustion process and result in a knocking sound. I suggest bringing your car to a mechanic for a diagnostic test to determine if this is the issue and if so, have the fuel injector replaced.