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2005 crown Vic headaches!

  • Creator
    Topic
  • #580144
    jeremyahjeremyah
    Participant

      The pictures show my problem with some corrections below

      Corrections:
      MAP measurements are in psi

      The last question about coolant temp sensor is supposed to say from not for

      Also I might of had solved my fuel trim while testing my fuel injectors resistance (it was .011 or .11 ohms Sorry I forgot) for all bank 1 injectors cylinder 1 had engine oil inside after i cleaned all on the bank it sounds and feels smoother also the fuel trims dropped after driving a bit

      Also I noticed right now that my fuel trims jumped back up to 53%. I don’t know if this Is why but I just
      1. let the pump prime (it went 75 psi)
      2. let it sit with key in on position (it dropped to 53 psi)
      3. after about 20 minutes the pressure was 0psi
      4. when It started it was normal starting except for the fuel trims and the rail pressure was 51 which dropped to 48 after a minute then straight to it’s normal 38 after 2 min.

      Is the pressure supposed to drop on a returnless fuel system?

    Viewing 7 replies - 1 through 7 (of 7 total)
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    • #580159
      college mancollege man
      Moderator
        #580165
        jeremyahjeremyah
        Participant

          This won’t work since I have a return less fuel system and no Schrader valve and Im pretty shure the pressure will be different since this system varies the pressure

          #580330
          jeremyahjeremyah
          Participant

            Does nobody else have any help?

            #580379
            college mancollege man
            Moderator

              [quote=”jeremyah” post=91088]Does nobody else have any help?[/quote]

              Your fuel pressure is way to high at 75 psi. I would have to suspect
              the fuel pump. It contains the check valve and fuel pressure regulator.
              The pump should hold fuel pressure on off cycle.

              http://www.ericthecarguy.com/faq/solving-automotive-performance-issues

              #580392
              jeremyahjeremyah
              Participant

                I do not have a fuel pressure regulator and I have also read that 75psi on this car is OK at prime and for the off cycle it doubt it matters since the car started up good so I’m guessing the numbers may be false I would have to check with pressure gauge.

                #580475
                EricTheCarGuy 1EricTheCarGuy
                Keymaster

                  I’ve just spent some time researching this issue and there’s not a lot of information out there. What I did find was that there seems to be a module that regulates fuel pump current to alter fuel pump pressure. Perhaps this is where your issue lies. More info here.

                  http://www.crownvic.net/ubbthreads/ubbthreads.php?ubb=showflat&Number=1845575

                  Keep us posted.

                  #580561
                  jeremyahjeremyah
                  Participant

                    Not to sound rude but Just wondering if anybody read my first sentence?

                    The second picture in my original post on the top right shows my problem

                    From what I learned the pressure is just fine since it goes 75psi when I turn the key it does not say there the whole time.

                    The Chilton book show’s pressure as good

                    The last picture show some live data and the reason why I posted this (the fuel trims are 53%)

                  Viewing 7 replies - 1 through 7 (of 7 total)
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