Final questions for M50 - HELP!

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  • Frog
    E30 Modder
    • Jun 2010
    • 980

    #1

    Final questions for M50 - HELP!

    Alright I have 5 last questions. These are noob questions, but I rather ask than mess something up. I promised this car would be running before christmas :eeek: I read all the threads, but still can't find this. The info I do find is not always clear, often contradicting.

    1. I had a M50 NV out of an Automatic. This is for the automatic computer. Can I cut it?



    2. This wire that goes to the fusebox, I am connecting it directly to the + battery terminal. Is that right?



    3. Polarity is right? The + will come from the battery, and the ground will be from the frame.



    4. I was told to go to the white wire on the C104. This is the C104? It has wires: white/yellow, green, and black.



    5. Help me sort out these hoses.



    I know B goes to the spider coolant hose.
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  • boyd_dave
    Member
    • May 2010
    • 42

    #2
    my harness wasnt from an automatic so I cant tell you much about the wiring.

    C- goes to charcoal can with evap valve. there is a connector that should connect to the evap valve.

    D, E are fuel hoses.

    Comment

    • boyd_dave
      Member
      • May 2010
      • 42

      #3
      i thought the power block was all +12v...

      whenever I wasnt sure about the wires in that area, i cut back the sleeve to check the wire color. all Red wires go to power block, all brown go to ground.

      Comment

      • hoveringuy
        R3VLimited
        • Dec 2005
        • 2679

        #4
        Originally posted by boyd_dave
        i thought the power block was all +12v...

        whenever I wasnt sure about the wires in that area, i cut back the sleeve to check the wire color. all Red wires go to power block, all brown go to ground.
        I have some blacks that are power, be careful with the black/red generalization of ground/power.

        Comment

        • Frog
          E30 Modder
          • Jun 2010
          • 980

          #5
          Middle line goes to Fuel filter -> then to E

          Top fuel hose connects to D.

          Correctamundo?

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          • richardb
            R3VLimited
            • Mar 2009
            • 2121

            #6
            Yes, you can cut the auto connector off and ALL of it's wires back as needed. Take your time and follow each one to make the harness nice and slim
            Transaction Feedback!

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            • Frog
              E30 Modder
              • Jun 2010
              • 980

              #7
              Questions:

              1. answered
              2. ???????
              3. kind of
              4. No answer
              5. Partial answer.
              ......5.a. What does 'A' go to?
              ......5.b. E is coming from fuel filter, right?
              ......5.c. C goes to which pipe on the charcoal canister?

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              • Jand3rson
                Banned
                • Oct 2003
                • 37587

                #8
                You're keeping the charcoal canister?

                Comment

                • cabin
                  E30 Addict
                  • Dec 2006
                  • 552

                  #9
                  One side (large) of the charcoal canister goes to the fuel tank, the other side (small) to the pressure valve and then to 'C' on your picture.

                  Both A and B are for coolant circulation to the throttle body, one is in the other is out. I have that circuit deleted since it's not really needed unless you are driving in sub-zero temperatures.
                  -Justin

                  sigpic

                  Current: BMWless for now... '15 Grand Cherokee & '03 Mach 1

                  Comment

                  • Frog
                    E30 Modder
                    • Jun 2010
                    • 980

                    #10
                    ^thanks


                    Originally posted by Janderson
                    You're keeping the charcoal canister?
                    Well, in a thread I read, people say to just keep it. I have mixed info on this one. I guess i wont use it, what do I do with the hardline from the fuel tank?
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                    • Schwarz325
                      E30 Addict
                      • Aug 2009
                      • 487

                      #11
                      The line with the fuel filter goes to D.

                      E is your return line.

                      Comment

                      • Frog
                        E30 Modder
                        • Jun 2010
                        • 980

                        #12
                        Originally posted by Schwarz325
                        The line with the fuel filter goes to D.

                        E is your return line.
                        Are you sure?


                        E goes to the fuel rail, but seems to have a fuel regulator. For this reason, I assumed it was NOT the return line. It is the one towards the BACK of the engine.

                        Here is a better picture of D and E.

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                        • Frog
                          E30 Modder
                          • Jun 2010
                          • 980

                          #13
                          1. Answered
                          2. Not answered
                          3. Answered
                          4. No answer. PLEASE HELP WITH C104.
                          5. Need clarification/confirmation of D and E
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                          • PeaveyBassist
                            No R3VLimiter
                            • Sep 2004
                            • 3511

                            #14
                            E is return. D is supply. The return always comes off the fuel pressure regulator.
                            RIP e30 (brilliantrot '91 325i) 11/17/06 Byebye: 8/21/07
                            Welcome e30 (brilliantrot '90 325is) 12/23/06
                            DaveCN = Old Man
                            My signature picture was taken by ME! Not by anyone else!



                            Originally posted by george graves
                            If people keep quoting me in their sig, I'm going to burn this motherfucker down.

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                            • samiam3356
                              E30 Mastermind
                              • Jul 2009
                              • 1901

                              #15
                              Originally posted by PeaveyBassist
                              E is return. D is supply. The return always comes off the fuel pressure regulator.
                              +1 he's right

                              Originally posted by Roysneon
                              $5 shipped?
                              Originally posted by MarkD
                              You are a strange dude, I'n not answering any more posts from you.

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