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  4. NEED MPI relay for 1g!

NEED MPI relay for 1g!

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  • D S ohMD Offline
    D S ohMD Offline
    D S ohM
    wrote on last edited by
    #1

    I think this is what is wrong. Anyone with one laying around call me. 701-541-1876. I just need to borrow one for a bit to see if thats what is wrong. That and I still need to check the resistor box.

    To any DSMer who does not know where the MPI relay is, it is the gold relay between the ecu and the shifter. Right hand side, two 8mm bolts hold it in place.

    Someone help please!!!

    I wanna go fast!

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    • zbrownZ Offline
      zbrownZ Offline
      zbrown
      wrote on last edited by
      #2

      Describe your situation some

      so you have spark or no spark?

      you are positive the injecotrs are not firing?

      rx7-8.89@157mph
      12v dodge, twins

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      • D S ohMD Offline
        D S ohMD Offline
        D S ohM
        wrote on last edited by
        #3

        I have spark. The injectors are not pulsing.

        I wanna go fast!

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        • zbrownZ Offline
          zbrownZ Offline
          zbrown
          wrote on last edited by
          #4

          does the fuel pump cycle??

          rx7-8.89@157mph
          12v dodge, twins

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          • D S ohMD Offline
            D S ohMD Offline
            D S ohM
            wrote on last edited by
            #5

            It does. Fuel is running through the rail and pressure is good.

            I wanna go fast!

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            • zbrownZ Offline
              zbrownZ Offline
              zbrown
              wrote on last edited by
              #6

              Do you have 12 volts at the injectors while cranking??

              I am sure you understand the ECU sends a ground to trigger each injector, but it would be hard to see with out an oscilloscope,

              But it should have 12v+ at every injector while cranking, so that is easy to check

              rx7-8.89@157mph
              12v dodge, twins

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