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  • fuel injector problem

    hello
    car is not starting ,check fuel and spark and have both,
    the injectors are not opening up.
    what do i check?
    thanx
    M3 GOTTA LOVE THEM

  • #2
    huh? if you have fuel then the injectors are working. maybe one of more is clogged? try tapping on it

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    • #3
      i dont think they are clogged ,what signals make the injector fire?
      i was trying to pullthe nut under the air box and the alternator wire spark ,could this have fried my computer?
      M3 GOTTA LOVE THEM

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      • #4
        Are the plugs wet? if so you have fuel.
        GraemeD

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        • #5
          you need to start at the beginning and explain yourself better so that people can assist you..

          1) WTF were you doing when you caused a short at the alternator?

          2) Why did you need to do it ... what prompted you to begin working on the car?

          3) is the car cranking? turning over? you have spark at the coil or the spark plug?

          4) did you pull the fuel hoses from the rail to confirm the flow of fuel or are the plugs getting wet?

          if there was a spark from the alternator you may have fried the alternator itself.. have you had it checked?


          Oh... and please unplug the battery
          if you are going to pull the alternator!
          Mark Williams
          Dallas, TX

          Nothing says "welcome to the neighborhood" like a search... oh wait... looks like they are all gone! :rastajake:

          sigpic

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          • #6
            hello
            i forgot to disconnect the battery
            the car is turning over and i check for spark at plugs and there is spark
            and also fuel at the hose,but there is no fuel on the plugs afer trying to start it.so i assumed there is fuel to the rail but the injectors are not spraying.
            could all four injectors be clogged it started like for 3 seconds once.
            M3 GOTTA LOVE THEM

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            • #7
              also the car was starting before could all four injectors go bad at once?
              M3 GOTTA LOVE THEM

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              • #8
                i now have checked the dme and the both sensors on flywheel and car still wont start.help
                i put the dme in my friends car and it started
                M3 GOTTA LOVE THEM

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                • #9
                  put your friends DME in your car

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                  • #10
                    Originally posted by kingston
                    i now have checked the dme and the both sensors on flywheel and car still wont start.help
                    i put the dme in my friends car and it started
                    pull one of the injector connectors and see if there is +12v on one of the terminals when the ignition is on. The +12v comes from the main relay that is behind the panel behind the coolant overflow tank. Get out the voltmeter. Always trust the voltmeter.

                    T

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                    • #11
                      i finally get to check the volts from the injector terminals and all is reading 11.96 or 11.98 volts would that .02 or .04 volts cause the injector to not fire .check the grounds on the dme and is okay.
                      main relay made that click noise when ignition is switch on also.
                      is there something i am missing what esle can i check?
                      M3 GOTTA LOVE THEM

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                      • #12
                        do the injectors click when you bridge the terminals to ground yourself? Probe the back of each injector connector and connect the lead that does not carry the +12V to ground for half a second.

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                        • #13
                          Kingston.

                          I have observed your experiences with this car since your first post about it sitting for several years prior to your current problems.

                          I have avoided throwing in any advice because In my observation:
                          1, The car was awoken from a lengthy slumber by a professed mechanic who absolutely failed to exercise any common sense, or knowledge about waking up a long dormant car.
                          2, After the car had been coaxed into running, the damage had been done.

                          The damage was to the entire fuel system., By starting the car without a reported check on the health of the vital systems of the car.

                          Considering the length of dormancy and a thoroughly contaminated fuel system, I think you should put the car back into suspended animation until you can find someone competent enough to restore the car to running condition and the funds/parts to do so.

                          There is nothing to stop you from learning on your own, but imo, it would be quicker and cheaper in the long run , to walk away from it until you have better resources.

                          It sounds harsh but i really think it may be your best option, for a while.
                          Otherwise, I'm afraid you won't be able to stay ahead on the failure rate of components and running time of the car.

                          m

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                          • #14
                            mmark thanx for your advice
                            the mechanic that put the car together is from a bmw specialist out here also all my fuel pump have been replace .i dont know anymore people out here that can help me ,so i am trying to little by little help myself (which may be the problem)i may have damage the entire fuel system as you say ,other wise that the fuel pumps and injectors and the grounds and the wiring what else is there to check.
                            if i have to change the entire fuel system i will so your advice will still be appreciated.
                            M3 GOTTA LOVE THEM

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                            • #15
                              found out the problem it was a bad alt ground cable .the fucks could not find a whole alt cable so they joined 2 halves together and when i was removing the air box i must have bounce it so it became loose.
                              will fit up sunday so i hope it will not give me anymore problems for now.
                              thanx
                              M3 GOTTA LOVE THEM

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