What is causing my Audi 80's engine to misfire?

I've noticed that my Audi 80's engine is misfiring and I'm not sure why. I've checked the spark plugs and they seem fine. What else could be causing this issue?

It's possible that your ignition coil is failing. This can cause the engine to misfire. I would recommend getting it checked and replaced if necessary.

Another possibility could be a clogged fuel filter. A blocked fuel filter can affect the engine's performance, including causing misfires. Have it checked and replaced if needed.

Have you checked your air filter? A dirty air filter can also contribute to engine misfires. I would suggest getting it replaced if it's been a while.