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S52 swap won't start!?

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    S52 swap won't start!?

    I need your help, I have a 91 318is with a s52 obd1 swap. I'm using a e34 wire harness and everything is wired correctly. Engine turns over fine, but there is no fuel coming to the fuel rail. I have already checked the fuses and relay, everything is fine. But I'm not getting any power to the fuel pump?

    Any suggestions?
    sigpic

    https://www.r3vlimited.com/board/sho...d.php?t=420591 5.3 LSA build in progress :devil:

    #2
    Are you getting spark?
    Past Car : E30 S50 6 Speed 5 Lug 3.73
    Current : Z3 S50 OBD2 (Smog Legal) 6 Speed BBS RN Dual Ear Diff
    ___________________________________________
    BNB Designs
    Engine Swaps, Fabrication, Innovation, General Repair
    Richmond CA
    Julian 848-248-8029

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      #3
      I haven't check for spark, I'll check in the morning... Im starting to wonder if it's the AA chip I have.
      sigpic

      https://www.r3vlimited.com/board/sho...d.php?t=420591 5.3 LSA build in progress :devil:

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        #4
        Are your fuel hoses on correctly? Have you verified the pump is not turning on with a multimeter?

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          #5
          My bet is the fuel hose.
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            #6
            Ok, no fuel and no spark. And I checked the fuel pump with a multi meter and nothing.
            sigpic

            https://www.r3vlimited.com/board/sho...d.php?t=420591 5.3 LSA build in progress :devil:

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              #7
              CEL in the run position?
              Past Car : E30 S50 6 Speed 5 Lug 3.73
              Current : Z3 S50 OBD2 (Smog Legal) 6 Speed BBS RN Dual Ear Diff
              ___________________________________________
              BNB Designs
              Engine Swaps, Fabrication, Innovation, General Repair
              Richmond CA
              Julian 848-248-8029

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                #8
                Cel? What is it and can u explain?
                sigpic

                https://www.r3vlimited.com/board/sho...d.php?t=420591 5.3 LSA build in progress :devil:

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                  #9
                  Help
                  sigpic

                  https://www.r3vlimited.com/board/sho...d.php?t=420591 5.3 LSA build in progress :devil:

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                    #10
                    CEL = CHECK ENGINE LIGHT

                    and you need to find out why there's no power to the fuel pump.

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                      #11
                      Yes the check engine light is on. Still no fuel or spark, do u guys think it's the ecu?
                      sigpic

                      https://www.r3vlimited.com/board/sho...d.php?t=420591 5.3 LSA build in progress :devil:

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                        #12
                        It won't power the pump until it senses engine rotation from the crank position sensor. Also, do you have a silver label DME?

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                          #13
                          I know it sounds dumb, but I had no fuel and spark, turns out i forgot to hook up the main power sorce cable from harness..
                          sigpic

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                            #14
                            I have a red label 413 with AA stage 2 chip
                            sigpic

                            https://www.r3vlimited.com/board/sho...d.php?t=420591 5.3 LSA build in progress :devil:

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                              #15
                              How is the C101 wired. Im betting there is your problem.

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