E30 Noise

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  • Idrisu
    Advanced Member
    • Jul 2015
    • 173

    #1

    E30 Noise

    Been having issues with my E30. Whenever I start the car I hear this siphoning like sound coming from the passenger side of the tank. You can sort hear it on the drivers side. About 2 minutes into idling, the sound stops and the engine cuts off. Not sure if it could be the fuel pump or the fuel pressure regulator. I know both my level senders are bad.
  • dishwab
    Mod Crazy
    • Mar 2012
    • 681

    #2
    Probably your fuel pump dying. In an E30 the fuel pump is accessed by removing the back seat and pulling it out of the tank on the passenger side of the rear bench. Pretty easy to replace

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    • Idrisu
      Advanced Member
      • Jul 2015
      • 173

      #3
      Originally posted by dishwab
      Probably your fuel pump dying. In an E30 the fuel pump is accessed by removing the back seat and pulling it out of the tank on the passenger side of the rear bench. Pretty easy to replace
      would the level senders play apart in the noise?

      Comment

      • TobyB
        R3V Elite
        • Oct 2011
        • 5182

        #4
        Other than being in the same physical location, not much...
        t
        now, sometimes I just mess with people. It's more entertaining that way. george graves

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        • itsonlygeorge
          E30 Modder
          • Feb 2014
          • 852

          #5
          You're fuel level senders are probably ok. It's just a float and a switch really. I would start by taking the pump out to take a look at it and shine a flash light in the tank to look for rust and crud on the bottom of the tank. Rust = Bad.

          It is most likely your fuel pump. Order a new one stick it in there and fire the car up. If there is rust in the tank your best bet will be to get a new tank as it will only be a matter of time before the new pump gets burnt up if the filter gets clogged.
          sigpic
          1987 325e Lachssilber w/ MarkD chip and late bumpers, Zender EVO spoiler, s3.25 LSD

          Originally posted by nando
          I don't think there's really strong evidence that ZDDP harms cats.

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