86 325es fire no start

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  • Landon325es
    Noobie
    • Apr 2023
    • 7

    #16
    Update for everyone helping, I have almost no fuel pressure I’m getting flow but the lines aren’t pressurized, I’m doing a smoke test on Wednesday and then going from there hopefully after the smoke test I can fix whatever leak there is and get this thing running thank you all

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    • Bimmerwolf
      Member
      • Nov 2021
      • 78

      #17
      Originally posted by Landon325es
      Update for everyone helping, I have almost no fuel pressure I'm getting flow but the lines aren't pressurized, I'm doing a smoke test on Wednesday and then going from there hopefully after the smoke test I can fix whatever leak there is and get this thing running thank you all
      Check your fuel pressure regulator . Smell dipstick make sure no gas smell .

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      • DesertBMW
        E30 Enthusiast
        • Aug 2011
        • 1011

        #18
        Originally posted by ZeKahr
        Check your reference sensor. There are two sensors on the driver-side transmission bell housing, one engine speed and one reference. These sensors control ignition timing. The DME needs a reference signal in order to keep the engine running after cranking. The engine should run with a working reference sensor and faulty speed sensor, albeit it will misfire


        True, some people install aftermarket flywheels that does not have raised pin for reference sensor

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        • packratbimmer
          E30 Fanatic
          • Dec 2009
          • 1329

          #19
          Originally posted by Landon325es

          How did you fix the no start? I know some people jump that relay box not sure the best way to go
          The 13 button main harness simply plugs into an existing connector on the stock harness. Simply trace along the harness and find the two ends that will plug together on the main wiring harness (as if you were removing the 13 button system altogether). Plug the two together and you have eliminated the 13 button "relay" for diagnostic purposes. I can take a pic or two if you need the help. Good luck! It sounds like you are closing in on it with the fuel pressure issue.

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