How do I troubleshoot a misfiring engine in an Audi 80?

My Audi 80 has been experiencing frequent misfires, causing the engine to run rough and lose power. What could be causing this issue and how can I fix it?

First, check the spark plugs and ignition coils for any signs of damage or wear. These are common causes of misfires in Audi 80 engines.

Another possible cause could be a clogged fuel filter. Make sure to replace it and see if the misfiring issue persists.