What is the most common cause of stalling in an Audi 80?

I have an Audi 80 and it keeps stalling at low speeds, as well as when idling. It also seems to struggle to start up at times. What could be causing this issue and how can I fix it?

The most common cause of stalling in an Audi 80 is a malfunctioning Idle Air Control Valve. This valve controls the idle speed of the engine and can often get clogged with dirt and debris, leading to stalling. To fix this issue, you can try cleaning the valve or replacing it if needed.