Fuel pump = no Power.

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  • Paukert11
    E30 Fanatic
    • Nov 2008
    • 1295
    #1

    Fuel pump = no Power.

    Ok this this is my problem..... SO i just picked up a new e30 and I replaced the head gasket. After that I went to start the car and nothing happened. So I found out that the fuel pump wasn't getting any power. So I checked the relay "b" and it was getting power. Then I checked the fuse but it wasn't getting any power. The car has a after market alarm and I was wondering if that was the reason why it wasn't working?? Or do you guys think that it could be the fuse box??? but that's the only fuse I am having a problem with........... so what do you guys think?
    Tags: None
    • jrdeamicis
      E30 Modder
      • Nov 2008
      • 956
      #2
      I need the year of the E30
      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

        Comment

        • billybobjoseph
          Wrencher
          • Mar 2011
          • 213
          #3
          Check fusible link on smaller of two battery cables about a foot from the battery under the carpet in the trunk ( assuming you don't have the vert ). Looks like a flat spot on the cable - peel back the rubber cover. It's 50 amp if you have to replace it.

            Comment

            • jlevie
              R3V OG
              • Nov 2006
              • 13530
              #4
              Are you checking for power when cranking the engine? The DME controls the fuel pump relay and only commands pump operation when timing data from a rotating engine is presented to the DME..

              A common mistake after engien work on a 325i/is/icis to get the CPS and Cylinder ID connectors swapped. That will prevent the DME from seeing timing data and thus the pump won't run.
              The car makes it possible, but the driver makes it happen.
              Jim Levie, Huntsville, AL

                Comment

                • Paukert11
                  E30 Fanatic
                  • Nov 2008
                  • 1295
                  #5
                  its a 89 sedan. I am checking it when the key is turned to the on. i will check the small fuse.

                    Comment

                    • jlevie
                      R3V OG
                      • Nov 2006
                      • 13530
                      #6
                      Originally posted by Paukert11
                      its a 89 sedan. I am checking it when the key is turned to the on. i will check the small fuse.
                      The pump isn't powered just with the ignition on. It won't have power until the DME sees timing data from a rotating engine.
                      Last edited by jlevie; 05-04-2011, 07:50 AM.
                      The car makes it possible, but the driver makes it happen.
                      Jim Levie, Huntsville, AL

                        Comment

                        • j0nny5
                          Advanced Member
                          • Aug 2009
                          • 123
                          #7
                          haha this got me one of the first times my car wouldnt start, damn non priming fuel pump...

                            Comment

                            • Paukert11
                              E30 Fanatic
                              • Nov 2008
                              • 1295
                              #8
                              By any chance could the security system have anything to do with this???? I just un plugged the ecu to re set it. I checked at the crank sensor plug and 2 of of the three were grounded.

                                Comment

                                • StereoInstaller1
                                  GAS
                                  • Jul 2004
                                  • 22679
                                  #9
                                  Originally posted by Paukert11
                                  By any chance could the security system have anything to do with this????
                                  no

                                  Closing SOON!
                                  "LAST CHANCE FOR G.A.S." DEAL IS ON NOW

                                  Luke AT germanaudiospecialties DOT com or text 425-761-6450, or for quickest answers, call me at the shop 360-669-0398

                                  Thanks for 10 years of fun!

                                    Comment

                                    • Paukert11
                                      E30 Fanatic
                                      • Nov 2008
                                      • 1295
                                      #10
                                      Ok thats what I thought.

                                        Comment

                                        • Killacortes
                                          E30 Mastermind
                                          • May 2010
                                          • 1937
                                          #11
                                          Originally posted by billybobjoseph
                                          Check fusible link on smaller of two battery cables about a foot from the battery under the carpet in the trunk ( assuming you don't have the vert ). Looks like a flat spot on the cable - peel back the rubber cover. It's 50 amp if you have to replace it.
                                          on my 89ix this is what was wrong with it. i was doing the same as you were i replaced the head gasket and i guess this little fuse blew out along with my cps sensor, it wasnt working. my fuse was only a 5 amp fuse tho
                                          Originally posted by blunttech
                                          r3v does not fuck around. First you get banned, then they shoot you

                                            Comment

                                            • Paukert11
                                              E30 Fanatic
                                              • Nov 2008
                                              • 1295
                                              #12
                                              The fuse in the back was good........

                                                Comment

                                                • Paukert11
                                                  E30 Fanatic
                                                  • Nov 2008
                                                  • 1295
                                                  #13
                                                  this is a auto. but i don know where the starter rekay is.
                                                  Last edited by Paukert11; 05-04-2011, 11:50 AM.

                                                    Comment

                                                    • Paukert11
                                                      E30 Fanatic
                                                      • Nov 2008
                                                      • 1295
                                                      #14
                                                      Ok so I found the starter relay. I just don't have power coming out of number 30 but i have power coming of the ignition black wire that's powers it. I feel like im getting closer!

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