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    M50 wont start

    Hi guys,

    I have a E30 swaped with a M50, engine cranks but doesn't fire. My engine is in it cranks but no spark or fuel. I have 12v to my injectors and wen i put a ground my brw/grn on my relay pump goes on. I have 12v to my dme on pin 26 and 56 and i have all my grounds the 2 on the shock tower and the one on the right engine mount.

    My DME is a silver label the finishes by 413 and its grounded. Ive done alot of research on this forum i took all the info for the swap here so i know we can figure the problem out.

    here is my piout for my c101 and x20 connectors

    E30 pin E36 pin
    Blue 1 blue 25
    brn/wht 4 brn/vio 12
    brn/gr 5 brn/grn 23
    grn/yel 6 grn/wht 22
    grn 7 grn 21 ( both wires are connected) small and big
    wht 8 wht/blk 24
    blk 9 blk 20
    wht/blu 11 wht/gr 19
    brn 12 gray 8
    grn/vio 13 grn/vio 13
    blk/wht 14 blk/wht 14
    blk/grn 15 blk/grn 15
    wht/blk 16 wht/vio 17
    blk/yel 18 blk/yel 18
    red/yel ABS connected to a red/wht fro main relay.

    So thats my pinout another thing my harness was automatic i removed everything and I have a brn/blk wire left I read to connect it to a red/wht wire?

    I dont know were to look no more!!!:-?

    Thank you

    #2
    Re check your relays. Will it fire if you jump them (imitating on positions)? You said your pump turns on when jumped but not using the normal relay?

    Comment


      #3
      Wen i give a ground to my brn/grn on my gas pump relay pump goes on but still dosent start.

      Comment


        #4
        You need a red label 413.. The silver label comes with a EWS system. Either you get a EWS DELETE chip that removes it or a red label 413.


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          #5
          Originally posted by mtlbloodshot View Post
          You need a red label 413.. The silver label comes with a EWS system. Either you get a EWS DELETE chip that removes it or a red label 413.
          this as well. i have a silver label and got my ews deleted by turner since it had turner stg3 tune already

          but if you want a cheaper route and get a 413 red label. i actually have one for sale
          Originally posted by evandael
          a car is a car. call it a dildo, i'd still drive the hell out of it.

          Comment


            #6
            ok so i need a E36 red label DME and has to finish by 413. And another question on my E36 harness how many wires are left unused i have 6.

            Comment


              #7
              I have another question about testing my cam and crank sensor. What is the best way to test them? I read that some guys inverted the plugs mine are male female so i cant mix them up?

              Comment


                #8
                You can test to make sure they ohm out properly with a meter. Which plugs are not connected? It depends on the harness

                Comment


                  #9
                  Ok so i tested my cam and crank sensor my crank gives me about 510 oms my cam gives me 0 oms. So i ordered one and im gonna install it this after noon and see if it still doesn't strart im gonna go pick up a red label dme.

                  Comment


                    #10
                    So i received my cam sensor and it gives me 0oms to i changed ohmmeter and same thing.Someone has a idea why both of them are not giving me no reading?

                    Comment


                      #11
                      Cam sensor wont cause a no start condition

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                        #12
                        My cam sensor is good i back probed it ant its giving 5 to 0 volts wen engine cranking. My crank is good also I am getting +- 510 oms. I ordered a red label dme im getting it tomorrow I am just hoping that's the problem.

                        Comment


                          #13
                          Pretty sure that the silver label DME is your issue. However, I just had a very similar issue on an S52 car last week. Turns out one of the smaller starter wires was grounding out and not turning power on to the DME.
                          '70 911s | '72 2002 | '88 M5 | '89 330is | '89 M3 | '95 911 | '02 M5 | '04 RR HSE

                          Comment


                            #14
                            Can someone tell me if my c101 and x20 connections are correct?

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                              #15
                              So i got my red label DME car started for 30 seconds. I have spark and injectors open i check with a noid light. I hear the fuel pump wen i crank but i don't have pressure. I switched my lines dint change nothing. On my M42 i had a pressure regulator on the fuel rail i dont on my m50 can that be a problem? I blocked the return with a vise grip and still dint start.

                              Now im gonna put the gaz pressure gauge on the pump direct see if the pump is ok. I read that the pressure should be at 43 psi is that correct?

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