MY GOLF mk1 DIES WHEN DRIVING

After getting the leads right -It so easily could be bits of rust etc actually sitting in the fuel line, so remove in -line filter, and then you gently blow back into the pipe that goes to the tank. It should be easy to push the petrol back into the tank! and then hear the air bubbles. If there is resistance (in my car there was, then suddenly it cleared) blow harder and it may clear. You would then need to do the old magnet thing in the tank if after looking in there is rust. The symptoms of my car was the same as you describe, and lots and lots of owners have found this problem. Hope that helps. Marcus.