Ford Mustang Forum - View Single Post - 2005 mustang high fuel pressure problem.
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post #7 of (permalink) Old 01-13-2014 Thread Starter
Bigdaddy44's Avatar
Joined: Jan 2014
Location: Malibu
Posts: 7
OK.. I changed fuel filter and no difference. I changed the fuel pump with a new OEM ford pump. It had a superceded part #. And then hooked up mechanical fuel pressure gauge in line. Koeo it pumps 90 psi and when car is running it is 95psi. When you turn off pump it sits at 50 psi. Check engine light stays on when running. Same code p0191.
Next I think I have to do electrical checks. Maybe another sensor is tied in with the frps. First I will check all grounds at pcm and I am getting some electrical contact grease to put on all connectors. Any other ideas to try will be much appreciated.
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