Trek 1130- 07 Missing spark
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Thread: Trek 1130- 07 Missing spark

  1. #1
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    Trek 1130- 07 Missing spark

    Hi guys . My trek is missing spark on cylinder 2 and 3. I have tryed to change the coils betveen the cylinders, still only nr 1 gives a spark. I have 12 v continiusly on nr 2 while the voltage on nr 1 and 3 alternate betveen 0 and 12 v. Thinking there might be something wrong with the pace sensor, or is the ECU fried. Sorry for the bad English writing, i am from Norway. Hope somone can help me .

  2. #2
    Senior Member Rick67's Avatar
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    Hi .
    Yes i think you may need to clean the crank sensor.
    Hopefully that will sort out the lack of spark to the other plugs.
    There is also a test routine in the manual to check the wiring to the coils does actually supply the ground from the ECU to ignite them.
    My old ECU did a similar thing to injectors and coils . But your issue doesn't sound the same .
    Hope you sort it

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    Thank you for your answer . I will try out the test routine

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    Member Desmodude's Avatar
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    Frode Hagemo
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    Anders, where in Norway do you live?
    Trondheim here.

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    Hei. Bør i Hønefoss

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    Member Desmodude's Avatar
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    Frode Hagemo
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    Ok, litt langt unna til å stikke innom.
    Jeg har en Trek og en Amazonas hvorav Trek'en er demontert som ren reservedelesykkel, jobbet litt med dem, så jeg begynner å kjenne disse syklene.
    Har du manualene?

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    King of the Group-Buys Laurencewhite's Avatar
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    Quote Originally Posted by Desmodude View Post
    Ok, litt langt unna til å stikke innom.
    Jeg har en Trek og en Amazonas hvorav Trek'en er demontert som ren reservedelesykkel, jobbet litt med dem, så jeg begynner å kjenne disse syklene.
    Har du manualene?
    Eh!!!
    Laurence

    Benelli Tornado 900 LE No. 49
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  9. #8
    Member Desmodude's Avatar
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    Frode Hagemo
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    Quote Originally Posted by Laurencewhite View Post
    Eh!!!

    He he, if we had qontinued the invasions twelve hundred years ago you all would be reading Norwegian
    I basicly said that he lived a tad far away for me to drop by, and asked if he had the manuals.
    Engenia likes this.

  10. #9
    Senior Member
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    Cam Douglas
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    When my Tre-K lost spark on one cylinder. The manual was no help. I did all the diagnostic tests listed in the manual (coil resistances, wire continuity, etc.) and they all gave a positive result, telling me nothing was wrong.

    The test that actually revealed the problem was one that wasn't listed in the manual. I tested the coil resistances with the coils plugged into the wiring harness by going to the ECU end of the wiring harness and finding the other ends of the coil primary feeds and testing from there. One of them showed open circuit, which meant one of the two-pin coil connector plugs wasn't making contact. All I had to do was squeeze the little female metal sockets in the connector on the end of the wiring harness with pliers so they made good contact with the pins on the coil side - problem solved!

    But in your case with two cylinders not firing, it's unlikely that two coil plugs would fail at the same time. But it's still worth doing the test just to make sure. The manual gives the pin numbers for the ECU plugs so you can identify the ends of the coil feed wires.

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