I might be in the same boat, I finally got almost everything done, and ready for the race, pulled the buggy off the ramp fired it up, got really excited, dropped it in second and punched it, reacted well then died. Restarts, same thing, went and checked the fuel pressure it bounces like crazy between 20-60 i think. I also bought a new pump recently losted below. It will go back to the mechanic, and maybe I'm need to buy another pump.
0580254910 Electric Fuel Pump Mercedes W123 W126 SL AUDI 80 100