How to diagnose and fix misfiring in an Audi 80?

I have noticed that my Audi 80 is misfiring, with a noticeable loss of power and strange engine noises. How can I diagnose the issue and fix it?

First, you should check your spark plugs and wires to make sure they are in good condition and properly connected. If they look damaged or worn, replace them. Also, check your ignition system for any faults or malfunctions.

Another common cause of misfiring is a clogged fuel filter. Make sure to replace it if it hasn't been changed in a while.