Join Date: Aug 2004
Location: Harlan ky, 40831
2003 mustang lx 3.8 high fuel pressure when warm.
Hey guys i have had this problem for a while now. As the car warms up it will start running very rich and loads up and tries to die. I have verified that the fuel pressure is going up around 70 psi when this happens. Pressure is tested at the rail and the frps reference voltage matches the pressure. I have replaced almost every sensor except the frps. Any help would be appreciated.
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93 hatch midnight blue 2710lbs 2890 with me
302 flipped stock trw's ,typhoon intake,70mm tb,gt40pheads,crane beehives,bbk lt,x-pipe,1chambers,safc,24lb inj,255 pump,76mm C&L,f-cam,4.30,t-5,king cobra clutch
best 1/4 time: 12.68 best 1/4 mph: 108.18