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Thread: ECU swapped, coils swapped - STILL NO IGNITION ON 4

  1. 04-12-2006, 05:12 PM #1
    ArtemLepilov
    ArtemLepilov is offline Major Contributor
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    Default ECU swapped, coils swapped - STILL NO IGNITION ON 4

    Today i pulled everything off the engine - namely the harness will try to find a cause for the misfire problem. This really pisses me off... Does anyone know what else I can do?

    -Artem
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  2. 04-12-2006, 05:13 PM #2
    granit_silber
    granit_silber is offline Major Contributor
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    Quote Originally Posted by ArtemLepilov
    Today i pulled everything off the engine - namely the harness will try to find a cause for the misfire problem. This really pisses me off... Does anyone know what else I can do?

    -Artem
    Could the spark wire be bad?
    -ashley


    '92 525iA / 179k miles / Born 3.92 / ABS / No ASC / stock / North Carolina



    Paper Gaskets Suck!
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  3. 04-12-2006, 05:18 PM #3
    ArtemLepilov
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    Possibly - thats why I took the wiring harness off - im going to check and see... Unfortunately I need to do a hell of a lot of work in astronautics at the same time and ship a lot of items... This is a very very bad time for me... This week is going to be hell.

    -Artem
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  4. 04-12-2006, 05:37 PM #4
    mholbrook
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    Did you try moving coil from number 4 to another cyl to see if you just have a bad coil?
    Mike Holbrook
    Meridian, Idaho
    1992 535im, 17", Euro M5 Throwing Stars 8's & 9's, FK-451 235/45s & 255/40s, M5 Sway Bars 25/20, Conforti chip, Lowes Ram Air, glass sunroof
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  5. 04-12-2006, 06:37 PM #5
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    winfred
    winfred is offline 5-10 Grand Master
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    did you check that you were getting the signal to that fuel injector?, the power should be constant with the key on and the computer triggers it with a pulsed ground signal
    all america wants is cold beer warm cat and a place to take a poop with a door on it
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  6. 04-12-2006, 07:11 PM #6
    ArtemLepilov
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    Are both the coil and the fuel injector work together with the same pulse at the same time?

    -Artem
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  7. 04-12-2006, 07:12 PM #7
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    winfred
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    no but one can shut down the other

    Quote Originally Posted by ArtemLepilov
    Are both the coil and the fuel injector work together with the same pulse at the same time?

    -Artem
    all america wants is cold beer warm cat and a place to take a poop with a door on it
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  8. 04-12-2006, 07:15 PM #8
    ArtemLepilov
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    so, when there is no continued circuit on the fuel injector, there is no spark? Is that how it works?

    -Artem
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  9. 04-12-2006, 08:16 PM #9
    ArtemLepilov
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    Note - some people suggested that a faulty crank position sensor can cause that problem. Is that even plausible? please let me know - I really need to get the car running asap!!!

    -Artem
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  10. 04-12-2006, 08:45 PM #10
    Rustam
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    Quote Originally Posted by ArtemLepilov
    Note - some people suggested that a faulty crank position sensor can cause that problem. Is that even plausible? please let me know - I really need to get the car running asap!!!

    -Artem
    I don't find this plausible. If the crank position sensor was faulty you would not be able to start the car. And then - why necessarily 4th cylinder? There must be something else.

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