super high pitched squeel

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  • E30godz
    E30 Mastermind
    • Oct 2003
    • 1524

    #1

    super high pitched squeel

    ok, after removing/installing fuel injectors for the 1000th time, i get the car running but i have this super high pitched squeel coming from under the intake manifold/fuel injector area....it seems to be depent on vacuum too as it osciallates in pitch with how much hg/inch im pulling (boost gauge). any ideas?
  • DaN
    E30 Fanatic
    • Dec 2003
    • 1265

    #2
    Can't think of anything in that area that would make that kind of noise, you sure it's not a belt squealing???

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    • E30godz
      E30 Mastermind
      • Oct 2003
      • 1524

      #3
      found it.

      you know the little "cap" that has a nipple on it that feeds a line to the FPR onthe M20 intake manifold? apprently its leaking.

      Comment

      • DaN
        E30 Fanatic
        • Dec 2003
        • 1265

        #4
        "cap" eh?
        Can you get a pic? How can it make a squealing noise? What was it leaking? What does it do?

        Comment

        • E30godz
          E30 Mastermind
          • Oct 2003
          • 1524

          #5
          the eta has one too, its on the intake manifold on the valve cover side. There is a bracket that attaches the valve cover and the intake manifold there and has some bolts running through it.

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          • DaN
            E30 Fanatic
            • Dec 2003
            • 1265

            #6
            Oh, the thing that the cold start valve bolts onto, and where the regulated air enters from the ICV, on an eta.

            Comment

            • E30godz
              E30 Mastermind
              • Oct 2003
              • 1524

              #7
              yup, on i's though, it just has a nipple for a vacuum hose...apparently air was leaking out the bottle.

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