How to troubleshoot a stuttering engine in the Audi 80?

I've noticed that my Audi 80's engine has been stuttering and jerking while driving. What could be causing this issue and how can I fix it?

Based on your description, it seems like the issue may lie with a faulty fuel injector. I recommend getting the injector checked and, if needed, replaced by a certified mechanic.

Another possible cause could be a clogged air filter. A dirty air filter can restrict airflow to the engine, resulting in stuttering and reduced performance. Consider changing the air filter and see if it improves the engine's performance.