How can I check the fuel pump on my Audi 80?

I suspect my fuel pump might be failing. What steps can I take to check if it is indeed the problem?

First, you should check the fuel pump relay and fuse to make sure they are functioning properly. If they are, you can then use a fuel pressure gauge to test the pressure at the fuel rail, making sure it matches the specifications for your Audi 80.

Another way to check the fuel pump is to listen for a humming sound when you turn the ignition to the "ON" position. If you don't hear anything, it may be a sign that the pump is not working. You can also try tapping on the fuel tank while someone else turns the key to see if it starts.

The fuel pump can also be checked by connecting a fuel pump tester to the power supply and grounding the ground pin. If the tester lights up, it means the pump is receiving power and should be working fine. If not, then the pump may need to be replaced.