Fuel Pump noise

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  • Beach Bum
    E30 Addict
    • Feb 2009
    • 466
    #1

    Fuel Pump noise

    So I noticed a buzzing the other day from the fuel pump. It manifested itself after a long day of driving between 3k-4k RPM. Today, however, it is gone.

    Any ideas? Worth buying a new pump now and putting it in the trunk in case it strands me? Also, what pump to buy as a replacement?
    Originally posted by george graves
    If people keep quoting me in their sig, I'm going to burn this motherfucker down.
    Tags: None
    • nosignal
      Wrencher
      • Oct 2007
      • 274
      #2
      I'm curious about this too. Mine's been doing this since I bought the car two years ago - I recently drove the car to Ohio (5.5 hours each way) and the buzz was much worse after that. Still hasn't left me stranded at least! :)
      ::: Present -- '87 325e, '95 525i
      ::: Past -- '91 318i, '95 540i/6, '85 323i Euro, '86 325es, '86 325e, '84 318i

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        • Beach Bum
          E30 Addict
          • Feb 2009
          • 466
          #3
          It did it again on the way home from an autoX two hours away. I guess it's brought on by hard driving, or maybe all the sloshing breaks something loose that gets sucked into the pump, which the pump later spits out. Still hasn't stranded me, either.
          Originally posted by george graves
          If people keep quoting me in their sig, I'm going to burn this motherfucker down.

            Comment

            • Liam
              Mod Crazy
              • Mar 2009
              • 753
              #4
              I would definitely have a backup on hand (just because).

              Is this an in-tank or an early setup?
              I'm Not Right in the Head | Random Rants and other Nonsense1st Order Logic Failure: Association fallacy, this type of fallacy can be expressed as (∃x ∈ S : φ(x)) → (∀x ∈ S : φ(x)), meaning "if there exists any x in the set S so that a property φ is true for x, then for all x in S the property φ must be true".

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                • Jean
                  Moderator
                  • Aug 2006
                  • 18228
                  #5
                  My early tank does that sometimes too, I replaced it awhile back when I noticed fuel smell by the rear driver's side tire just in case.
                  Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



                  OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

                    Comment

                    • Beach Bum
                      E30 Addict
                      • Feb 2009
                      • 466
                      #6
                      Early model underbody mount. Easy 10-min swap either way.
                      Originally posted by george graves
                      If people keep quoting me in their sig, I'm going to burn this motherfucker down.

                        Comment

                        • Zachary
                          Noobie
                          • Sep 2009
                          • 18
                          #7
                          mine makes a noise too.... strange

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