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bad misfire

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    #1

    bad misfire

    i have a question about the distributor, does it control the injectors? i have a problem that my second injector clip does not want to work at all.....i switch the clip to the other three injectors and it does absolutly nothing. any help would be appreciated.
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    #2
    Not directly. Inside the distributer is a position sensor that sends a signal to the ECU. The ECU uses this signal to know what position the crank and pistons are at, then it sends a signal to each individual injector telling it when to pulse fuel. When you say you switch the plug around do you move the plug to another injector or you move the injectors around? If you are just moving the plug that wont help you any since the ECU will still tell it to pulse based on its correct position (plug 3 will pulse when it is time for cylinder 3 to get fuel, even if its plugged into injectors 1, 2, or 4). Try moving the injectors around and see if the problem moves. If so, then bad injector. If the same plug still is bad even with the other 3 injectors in that spot, then its most likely bad wiring from the plug to the ecu or the resistor box.

    Are you sure your misfire is a fuel issue and not a spark issue?
    Last edited by Shadow1992; 05-24-2011, 02:35 AM.

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      #3
      yes, i am positive thats its a fuel problem. and when i say move the plug around i mean just the plug by itself, and the weird thing about that is that the plug has electricity going to it..... i have changed ecu, resistor boxes, injectors, spark plugs, everything i could think of. and by the way, there is spark.

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        #4
        The wiring for the injectors is such that you have power/pulse signal going to them from the ECU, then back to the resistor box where they all eventually tie together. So even though you may have power there may be a wire break from the plug to the resistor box, thus keeping it from completing the needed circuit.

        The fuel system is pretty simple and except for the 4 injectors, and their harnesses from the ECU and to the resistor box, all parts are shared. So there is little that could stop just one part from working while the others still do.

        When you switch the plug to another injector does that injector stop working but the previous one start? or Does the problem stay on the number 2 cylinder?

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          #5
          no the problem moves with the plug, but i just figured out what the problem was. the wire harness was the problem.

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            #6
            what part of your harness was at fault im having a similiar problem

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