Join Date: Nov 1999
Location: Midland, TX, USA
John--There are problems getting a proper feedback signal to your computer with a pre-99 constant speed 12 v pump, I think. The 99 and later pumps are pulse width modulated and that is what the FPDM does--takes a digital signal from the computer and adjusts the power to the pump to vary capacity to match the demand.
I don't know how to eliminate the FPDM, go to a constant speed pump, and get a feedback signal back to the computer so you don't get a light. You may have some additional work to do.
What I did was use a eFPC from Zone V Performance and the '03 pump with an Aeromotive mechanical fuel pressure regulator. I lie to the computer about what the fuel pressure is, get the computer to speed up the pump past the set point of the regulator, and, voila, I have a return type fuel system, the computer just doesn't know its being done.
99 Cobra Convert, 99GT live axle, 31 spline C-Locker, Mark Williams axles, HPM upper and lower, FMS alum driveshaft. Pro-Motion pro-shifted TKO-500 trans.
28x10/15 ET Drags on Pro-Star 15x10, 6.5BS wheels Star Stage 3S clutch, MAFterburner Plus, Aeromotive A1000-6 regulator, return style fuel system,
Aug, 2003 forged motor, HP cams, SHM valve springs, short runner intake, SCT Flasher for tuning. Best
150 shot is 10.77 at 127.8 mph in very good air. 1.35 60'.