How to troubleshoot a misfiring engine in an Audi 80?

My Audi 80's engine is misfiring and I've noticed a decrease in performance. What should I do to diagnose and fix this issue?

The most common cause of misfiring in an Audi 80 is a faulty ignition coil. I would recommend checking the coil and its connections for any signs of wear or damage. If necessary, replace the coil with a new one.

Another possible cause of misfiring is a clogged fuel injector. I suggest using a fuel injector cleaner regularly to prevent buildup and improve engine performance.

Check the spark plugs and wires for any signs of wear or damage. If they are worn out, replacing them may solve the misfiring issue.