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1994 ford crown vic fuel pressure problem at idle 30psi but

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  • April 19, 2012 at 11:00 am #435817
    igdltigdlt
    Participant

      Like i said the car is at 30psi at idle and wen asselerated increases 5 psi and wen the fuel pressure regulator disconnected it goes to 40.Car specs are 35-45psi koeo. I think it might be a fuel volume problem what do you guys think. Oh yea and i got a code 335 code.

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    • April 19, 2012 at 11:00 am #435818
      college mancollege man
      Moderator

        Is the car hesitating or drive ability issues? its normal for the fuel pressure to jump up when vac line unplugged.
        nothing so far sounds out of spec. no gas in the vac line. you could do a leak down check. is the fuel filter clean?
        As for the p0335 crank position sensor. check the connector and harness for problems.If you have a scan tool.
        disable the ignition and crank the engine and see if you can read a crank rpm. if not replace the sensorC8-)

        April 19, 2012 at 11:00 am #435819
        dreamer2355dreamer2355
        Participant

          Code 335 is EGR related for the DPFE sensor. There notorious for failing on Fords.

          Here are some video’s by Scanner Danner that may help you –

          http://www.youtube.com/watch?v=znw-gjLE … 6waNYZU%3D

          http://www.youtube.com/watch?v=pH_kjRwD … k2Q6A5Q%3D

          April 20, 2012 at 11:00 am #435820
          EricTheCarGuy 1EricTheCarGuy
          Keymaster

            Yea it doesn’t sound like your problem is fuel pressure related, that is a great video BTW and it should help you.

            April 20, 2012 at 11:00 am #435821
            college mancollege man
            Moderator

              Sorry about the 335 code.mislead.C8-) when I searched it came up crank position sensor

              April 20, 2012 at 11:00 am #435822
              igdltigdlt
              Participant

                @ dreamer2355 thanks for the vids links it helped me narrow down the 335 code@ collegeman i made the same mistake i looked it up online and somewhere it showed to be the crank sensor, then i looked up on the mitchellondeman and it was the dpfe sensor. it

                April 20, 2012 at 11:00 am #435823
                johnzcarzjohnzcarz
                Participant

                  You didn’t say if the vehicle is showing any symptoms or not.
                  To answer your question – yes, you can have good pressure but not volume, and vice versa.

                  These guys did an excellent video showing one scenario: http://www.youtube.com/watch?v=K7qVwQSZ6OU

                  April 21, 2012 at 11:00 am #435824
                  igdltigdlt
                  Participant

                    @johnzcarz Sorry about that.The car had a no start condition, but it got fixed after replacing the fuel pump and fuel tank because of rust issues.And after that i found a vacuum leak, fixed it and then the car ran great. I

                    April 23, 2012 at 11:00 am #435825
                    EricTheCarGuy 1EricTheCarGuy
                    Keymaster

                      Cool, thanks for posting your fix and for using the ETCG forum, your contribution will go on to help others with similar issues.

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