Sounds like it could be a cpule things, i would start with replaceing the fuel filter and re-testing if that yeilds no change unplug the fuel presure regulator or if posible temp clap off the return line and check presure again, if it comes up to where it needs to be then replace the regulator. finnaly if none of those things solve it i would be very suspect of your fuel pump modual. good luck! let me know if i can be of further help, please rate my answer take care
SOURCE: 2006 Ford F-150 5.4 engine. code
2006 Ford F-150 5.4 engine: code P0191 fuel rail pressure sensor circuit range / performance
First step is to change the fuel filter and test the car. If the problem still occurs: The fuel pump driver module was corroded through from salt and was malfunctioning. Bought a new one and runs great. Problem fixed. See pictures below:
This is why salt destroys cars.
SOURCE: what is the fuel pressure supposed to be. I tested
You have a plugged fuel filter or faulty fuel pump!!
Pressures should run
30-45 lb at Idle with vacuum line on fuel pressure regulator hooked up!
40-50 lb at Idle with vacuum line removed from fuel pressure regulator!
30-40 lb 5 min after shut down!
Fuel pump Max pressure 65 lb!!
SOURCE: 1997 Ford windstar Low power and very poor
35 is low fuel pressure, should be around 40-44 PSI and 46-50 PSI under a load, replace the fuel filter it may be clogged.
SOURCE: I am working on a 2000 Ford Taurus with a 3.0L
where is the fuel pressure located on the 2000 ford taurus exactly?
SOURCE: Where is the fuel pressure regulator located on an 2002 f150 v6?
in the center of the motor,in the rear on the fuel rail
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