How do I troubleshoot a rough idle in my Audi 80?

I've noticed that my Audi 80 has been idling rough lately. What could be causing this and how do I fix it?

First, check your spark plugs and wires to make sure they're in good condition. If they're worn out, replace them. Then, clean your idle control valve to ensure proper air flow. Finally, make sure your engine oil and filter are clean. These steps should help improve your idle.

Have you checked your vacuum hoses for leaks? A vacuum leak can cause a rough idle. Also, check your fuel filter and replace if needed. If the issue persists, it may be a problem with your fuel injectors. You may need to have them cleaned or replaced.