I had this same probelm! You will need to pull the relays and check them with a power source (battery/charger) and an ohm meter. Check all three relays, fuel pump, engine management, and main. Leave these hooked up for 5 minutes. Also check your ignition switch and both connections to the starter. If the ECU does not get the correct signal from the starting circuit, it will shut off the fuel pump relay. Hope this helps, Steven.