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Check Engine Light - Coil Pack Suspect? S40-V40 2003

posted by  DougW on  Sun Jan 2 15:53 CST 2022
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last visit: Sat Mar 29 14:15 CST 2014
[RELATED]

Hello, while in the process of installing new spark plugs in my beloved 2003 S40, when I pulled the two wires that supply power to one of the coil packs, the insulation on those wires crumbled and are now almost completely bare.

I put new plugs in and tried to insert the two wires back into the connector and I think I got them connected, but when I start the motor, it runs great but the "Check Engine" light is on.

Could it be caused by the two wires being close to each other and perhaps arcing? What should I reinsulate the two wires with? Like I say, the old insulation nearest to the business end of the wire is pretty much gone.

Any insight greatly appreciated.

Regards,

DougW







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    Check Engine Light - Coil Pack Suspect? S40-V40 2003

    posted by  KlausC on  Mon Jan 3 15:52 CST 2022
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    last visit: Fri Oct 24 10:15 CST 2014
    [RELATED]

    Inserting the wires may not have been enough to create a 'good' connection and now you have a random misfire. You should get a new plug.
    --
    Keeping it running is better than buying new








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      Check Engine Light - Coil Pack Suspect? S40-V40 2003

      posted by  DougW on  Tue Jan 4 16:21 CST 2022
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      last visit: Sat Mar 29 14:15 CST 2014
      [RELATED]

      Why not re-insulate the two wires. The plugs were brand new with maybe 15 second total of running time on them. Doug








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        Check Engine Light - Coil Pack Suspect? S40-V40 2003

        posted by  riverbend on  Wed Jan 5 09:01 CST 2022
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        last visit: Wed Oct 22 15:29 CST 2014
        [RELATED]

        I think Klaus means the plug on the end of the wires. Hopefully it comes with a long enough pigtail to get past the crumbly insulation.
        Greg








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          Check Engine Light - Coil Pack Suspect? S40-V40 2003

          posted by  DougW on  Wed Jan 5 09:16 CST 2022
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          last visit: Sat Mar 29 14:15 CST 2014
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          I think I have enough info now. I was just trying to find out whether having little or no insulation on those two wires that plug into the coil pack could cause the Check Engine light to come on. Thanks!








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        Check Engine Light - Coil Pack Suspect? S40-V40 2003

        posted by  KlausC on  Tue Jan 4 16:44 CST 2022
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        last visit: Fri Oct 24 10:15 CST 2014
        [RELATED]

        I didn't mean the spark plug. I meant the coil plug! Those are very low voltage wires, they shouldn't arc.
        --
        Keeping it running is better than buying new







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