The drivetrain is 2004 Mach 1, DOHC 32V, Mustang fuel tank, pump etc. Here is the dilemma: Turning the key to the on/acc position the fuel pump will come on, pressurize the system and stop, like it normally would. Turn the key to the crank position and the vehicle will start, but the fuel pump will NOT kick back on, therefore the engine only runs for a few seconds. Changed out the fuel pump, fuel pump control module, the crank trigger sensor. Double and triple checked wiring, matches up with the schematics from the Mustang, have plenty of ground wires that have also been triple checked. The computer was flashed by Ron Francis to ONLY remove the PATS and after cat O2 sensors. ANY help or information is appreciated. This has been going on for far too long. I prefer to keep this set up, but if I can't figure it out I'll be forced to get a complete new fuel system, which I don't want to do. Had it hooked up to a Ford dealer scan tool, no codes came up.
Thanks, Mike