What is the best way to troubleshoot engine misfires in an Audi 80?

I've been experiencing intermittent engine misfires in my Audi 80. The check engine light is on and I've noticed a decrease in engine performance. What steps should I take to diagnose and fix the issue?

The first step is to verify the spark plug and ignition coil are functioning properly, as these are common causes of engine misfires in the Audi 80. If they are both functioning correctly, the issue might be with the fuel injectors. Try cleaning or replacing them.

Another possible cause of engine misfires in the Audi 80 is a faulty mass airflow sensor. It's recommended to have this component checked and replaced if necessary. Keep in mind that using low-quality gasoline can also contribute to misfiring issues.

If the check engine light is on, there should be a stored error code that can help identify the source of the problem. Consider using an OBD-II scanner to retrieve the code and get a better idea of what might be causing the engine misfires.