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fault code for fuel injectors

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    #1

    fault code for fuel injectors

    Why would there be fuel injector faults for all 6 injectors on an m50? I am trying to figure out why the m50 in my friend's car will not start.

    All injectors have 12 volts through them with key-on. They all inject fuel, all 6 plugs wet, and the send and return lines are connected correctly. There is also 12 volts at the ecu for the fuel injectors. There is also spark, and everything is grounded very well. The crank and cam sensors are wired correctly (crank sensor checks out on ohm test, cam sensor didnt come out with the spec I had). Upon no start, I plugged the code reader in and got 6 codes all for fuel injectors. Why? I dont think they could all be bad especially if there is fuel in the cylinders.

    Also, there is combustion, sometimes very violent combustion like the exhaust valve is open causing flames to shoot from the manifolds, or excess fuel is running through the manifolds and igniting somehow. Only way to describe the operation is that it's like a motor that is out of timing sequence, fuel and spark aren't happening when they are supposed to.

    Any ideas?
    Old and improved:
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    #2
    All are stuck open maybe? This happened to my 89 while it was sitting, for an extended period of time. It had electrical problems (why it was parked) I got the car, then fixed that, and found out the fp was dead, and all 6 injectors were stuck open..........

    Again I'm no mechanic, I just play one on Saturdays............

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      #3
      It almost seems like it. Because there seems to be large quantities of fuel in the chamber and spark plugs, moreso than what I think should be there. It would explain the poping from the exhaust and failure to start, kinda seemed like it was flooding.

      My concern is all 6? I have another set of injectors I guess he could try that I know are in working condition. However, im kinda thinking that the ecu is not switching them on and off, which means bad ecu. I am going to have him try and swap it, but I'll keep the injectors as a back up.
      Old and improved:

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        #4
        Try jumping the injector(s) manualy and listen for a nice consistant click.
        This will be a good indication of there condition, but will not elliminate the possibility of seating problems. This condition does not tend to happen to daily driven cars, has this engine been siting far any great deal of time?
        Previous cars, bmw's 85 325e 93 318is
        88 suzuki samurai

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          #5
          Dont know how long the injectors were out of a car for. He bought the intake with the injectors I'm assuming and he does not know the condition.
          Old and improved:

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            #6
            check the harness connector? it's under the intake manifold..

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