09 legacy 2.5 non turbo/#2 cylinder misfire check engine light

Discussion in 'Subaru Legacy' started by denny69, Jun 14, 2021.

  1. denny69

    denny69

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    09 legacy 2.5 non turbo/#2 cylinder misfire check engine light, I'm a new Subaru owner and I have no idea where to begin. Maybe spark plug or wire? please help
     
    denny69, Jun 14, 2021
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  2. denny69

    remy6908

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    Id start with the plugs then coil. Check the spark plug and if its good swap the coil from one to another and see if the misfire follows.
     
    remy6908, Jun 14, 2021
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  3. denny69

    denny69

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    thanks so much, i will get back and let you know how its going.
     
    denny69, Jun 14, 2021
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  4. denny69

    denny69

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    it wasn't the plug, guess I will try coil
     
    denny69, Jun 15, 2021
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  5. denny69

    denny69

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    when you say coil, swap one for the other, do you mean switch number 2 wire to another spot on the coil? isn't there a firing order?
     
    denny69, Jun 15, 2021
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  6. denny69

    TheMortallyWounded

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    Not 100% familiar with it but looking at the coil pack for a 2009 it looks like you have two coils. Each coil goes to two cylinders. Usually in this arrangement each coil fires twice per rotation, simultaneously, making that a "waste spark" to try and ignite unburned fuel. But that's not important right now.

    You should be able to swap the coils. If the misfire switches to a different cylinder, then it's that coil. If it's ANY coil, replace them BOTH. It's old enough where they will probably need it soon.
     
    TheMortallyWounded, Jun 21, 2021
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  7. denny69

    denny69

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    tested coil and wires both are good, gonna try fuel injector.
     
    denny69, Jun 23, 2021
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  8. denny69

    richardmaberry

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    So the wires are in a set order so you dont want to attach them backwards. I had a mouse chew into my cool wiring and I learned to look closely at all my wiring.
     
    richardmaberry, Jul 2, 2021
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