What should I do if my Audi 80 is experiencing rough idling issues?

I noticed that my Audi 80 is having trouble idling smoothly. The engine seems to be shaking and I can feel vibrations throughout the vehicle. What could be the cause of this and how can I fix it?

The most common cause of rough idling in a Audi 80 is a dirty or clogged air filter. I recommend checking and replacing your air filter if necessary. In addition, it's a good idea to clean your throttle body and idle air control valve.

Another possible cause is a malfunctioning oxygen sensor. This can cause the engine to run too lean or rich and result in rough idling. I suggest having a diagnostic test done to check the oxygen sensor and replace it if needed.

If your Audi 80 is equipped with a turbocharger, a failing turbo or wastegate can also cause rough idling. It's important to have these components inspected and possibly replaced if they are not functioning properly.