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    #1

    Newb question. Need help identifying this....thing...

    What is the thing in the pic that has a bunch of holes? (Similar to what I'd call a honeycomb)

    Thanks for any help!

    Edit: Anyone know if there is a schrader valve to check the fuel pressure? This is on an 85 325e, BTW.
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    #2
    Looks like the old style diagnostic port that was on my B34...
    sigpic'87 335i

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      #3
      Wiring diagram: http://shark.armchair.mb.ca/~dave/BMW/e30/e30_85.pdf

      See page 12/205 - Diagnostic Connector

      Grounding Pin-7 to Pin-1 will reset your Service Interval Indicator.

      Comment

        #4
        That is the early style diagnostic connector (the cap is missing).

        E30's don't have schrader valves on the fuel rail.
        The car makes it possible, but the driver makes it happen.
        Jim Levie, Huntsville, AL

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          #5
          Thank you all so much! I ordered a CPS and was going to swap it, but it seems to plug into that diagnostic connector. That's why I was wondering what that thing was. $50 down the drain I guess. Ugh.

          Will the service indicator cause a no fuel issue?

          Comment

            #6
            The cps plugs in underneath the diag port, and will cause no fuel/spark.

            Comment

              #7
              Originally posted by 2gBoostin View Post
              Thank you all so much! I ordered a CPS and was going to swap it, but it seems to plug into that diagnostic connector. That's why I was wondering what that thing was. $50 down the drain I guess. Ugh.

              Will the service indicator cause a no fuel issue?
              There is a timing sensor on the front of the engine that connects to the diagnostic connector, but that sensor is only for diagnostic purposes. The timing sensors that the DME uses on mounted in the bell housing of this car.

              The SI board (or anything in the cluster) has nothing to do with the fuel supply.

              The fuel pumps only run when the DME sees timing data from a rotating engine. So if there is no fuel being delivered to the rail at all the possibilities are:

              No timing data to the DME
              Bad fuel pump relay or fuse
              Wiring fault
              Dead pump(s)
              A DME power/ground issue
              Bad DME

              If the engine has spark when cranking, the DME and timing sensors aren't the problem. If fuel is being delivered, but the rail pressure is incorrect the possibilities are:

              Bad FPR
              Clogged filter
              Obstructed line
              Bad pump(s)
              The car makes it possible, but the driver makes it happen.
              Jim Levie, Huntsville, AL

              Comment

                #8
                Jlevie: Damn good info there. Thank you.

                I know the pumps work (shoots fuel when line is disconnected and key is on/cranking) and there is spark (starter fluid test). So, guess its down to the fpr, which I believe is at the front of the fuel rail.

                Comment

                  #9
                  Do yourself a big favor and download the free Bentley Manual!

                  Comment

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