Why does my Audi 80 stall when I come to a stop?

I've noticed that whenever I come to a stop, my Audi 80 stalls out. It seems to be running fine while driving, but as soon as I slow down or stop, the engine dies. What could be causing this issue?

This could be caused by a few different things, but the most common culprit is a dirty or faulty idle air control valve. This valve is responsible for regulating the air flow into the engine when the car is at idle.