Fuel regulator pic

[Denis]

  Car: Audi 100Q 1989
  CIS-3
  Problem: Low fuel system pressure .
  Fuel pump tested:OK
  Fuel syst pressure:62 psi approx.

  I did made an air pressure test on my Fuel Pressure Regulator.
  I putted an air regulator to the fuel inlet of the FPR with 0 to xx psi. The regulator open at 60 psi instead of 90psi.

  The car has been accidented before i got it so maybe they put the wrong regulator from another car...VW !! other Audi !!, i dont know.

  When the FPR in place i read 62 psi system pressure but with the air it only goes to 60. Anyway its far from 90psi.
  60 psi it s precise pressure, it might not be a 90psi regulator. They might tried couple regulators until they found one that works, even at the wrong pressure.

  I tried to put 90 psi short  shoots to make a dust come out..... from inlet , return line. But nothing changed , the FPR still open at exactly 60psi !!


  Ðenis


    ----- Original Message ----- 
    From: SJ 
    To: Denis 
    Sent: Sunday, January 09, 2005 9:30 PM
    Subject: Re: Fuel regulator pic





    ----- Original Message ----- 
    From: "Denis" <sparkplugvw at hotmail.com>
    To: "SJ" <syljay at optonline.net>
    Sent: Sunday, January 09, 2005 8:34 PM
    Subject: Re: Fuel regulator pic


      I means partout it and see whats wrong but it ll be good for nothing after
    that :-).
    **** Yeah, thats what I do with bad parts . . .take them apart to see what
    the failure mode was. I'm curious.
    Take some pictures when you take it apart.

      I ll remove it and push some air pressure on it to let get out a big dust
    stucjed inside :-).
    **** yes, try blowing it out first . . .it may be some crap stuck on the
    valve seat.

      Ðenis
        ----- Original Message ----- 
        From: SJ
        To: Denis
        Sent: Sunday, January 09, 2005 2:48 PM
        Subject: Re: Fuel regulator pic




        ----- Original Message ----- 
        From: "Denis" <sparkplugvw at hotmail.com>
        To: "SJ" <syljay at optonline.net>
        Sent: Sunday, January 09, 2005 2:14 PM
        Subject: Re: Fuel regulator pic


          Haa YES. Too much flow out of the return line.
          Can i fix it ? i guess not.
        **** Fix it? There is nothing wrong. I was merely explaining why you
    have a
        high flow.

        SJ


          Ðenis
            ----- Original Message ----- 
            From: SJ
            To: Denis
            Sent: Sunday, January 09, 2005 2:02 PM
            Subject: Re: Fuel regulator pic



            Good!
            I think your fuel pump is OK.
            Keep in mind that the pressure regulator is not functioning. Thats
    why
        you
            have such high flow.
            If the regulator was working at 90PSI, you would not get such a high
        fuel
            flow.

            SJ

            ----- Original Message ----- 
            From: "Denis" <sparkplugvw at hotmail.com>
            To: "SJ" <syljay at optonline.net>
            Sent: Sunday, January 09, 2005 12:44 PM
            Subject: Re: Fuel regulator pic


              I just made a test for delivery. I unplugged the return line and
        plugged a
            rubber hose to the return line, then to a 4liters can.

              2000cc in 45 secondes. so 1333 cc in 30 sec. Its double as the
    spec
        said.

              Ðenis
                ----- Original Message ----- 
                From: SJ
                To: Denis
                Sent: Sunday, January 09, 2005 11:27 AM
                Subject: Re: Fuel regulator pic



                That fuel return fitting is very important. Notice that its
    above
        the
            bottom
                section of the valve body.
                When the fuel pump is shut off, the whole valve closes including
    the
            bottom
                section. That keeps the fuel in the system pressurized.
    Otherwise,
        you
            would
                have a hard time starting under warm conditions > vapor lock in
    the
        fuel
                lines.

                You show an adjustment at the bottom of the Regulator. Are you
    sure
        its
                there? yes, i checked it, it s for residual pressure.
                This might be the adjustment for calibrating the Regulator on
    the
            production
                line.

                You should be able to test the regulator with air pressure.
                Close off the fuel return line.
                Let in pressurized air and listen for leaks.
                The valve should open up at 90 PSI.  i might try this.

                Maybe you just have something clogging one of the valves inside.
    A
        good
            shot
                of air might unclog it.yes,might be.

                Have you tried Chris Semple at Force Five for a used Regulator?

                SJ


                ----- Original Message ----- 
                From: "Denis" <sparkplugvw at hotmail.com>
                To: "SJ" <syljay at optonline.net>
                Sent: Sunday, January 09, 2005 8:56 AM
                Subject: Fuel regulator pic


                  There is the pic.This one is very $$. I cant use another type
        cause it
                need a fitting for the return line from the distr.
                  I tought use a good adj FPR.

                  Ðenis