How can I troubleshoot a faulty ignition coil in an Audi 80?

I suspect that my Audi 80's ignition coil may be causing issues with the ignition system. The car is experiencing misfires and stalling, and I have noticed a decrease in engine performance. How can I diagnose and fix this issue?

First, check the wiring and connections to the ignition coil. Make sure everything is secure and not damaged. If that all looks good, you can use a multimeter to test the resistance of the coil. This will help determine if the coil is working properly or if it needs to be replaced.

Another possible cause of faulty ignition coils in Audi 80s is moisture or condensation. Check the area around the coil for any signs of water or moisture. If found, dry it off and check again to see if the issue persists.