Why does my Audi 80's engine stall?

I recently bought a used Audi 80, and have been experiencing an issue where the engine stalls after driving for a few minutes. The check engine light is not on, and I have tried topping up the fuel and replacing the air filter. What could be causing this issue?

The most common cause of engine stalling in cars is a faulty fuel pump. It could be possible that the fuel pump in your Audi 80 is not delivering enough fuel to the engine, causing it to stall. Consider getting it checked and replaced if necessary.

Another possible cause of engine stalling is a clogged fuel filter. If the filter is dirty, it can restrict the flow of fuel to the engine and cause it to stall. Try replacing the fuel filter and see if it helps.