misfire cylinders 1,2, and 4.
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This is a discussion on misfire cylinders 1,2, and 4. within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; (02 WRX) I have a misfire problem with 1,2,and 4. i checked my coils, plugs, connectors, cam sensor, MAF sensor, ...

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    misfire cylinders 1,2, and 4.

    (02 WRX) I have a misfire problem with 1,2,and 4. i checked my coils, plugs, connectors, cam sensor, MAF sensor, and my vacuum lines. cant figure out the problem, I NEED IDEAS.

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    Moderator Donkey's Avatar
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    Quote Originally Posted by Donkey View Post
    I already went through all that. nothing worked

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    Quote Originally Posted by Subaru1229 View Post
    I already went through all that. nothing worked
    You tried every single thing I posted?
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    Quote Originally Posted by Donkey View Post
    You tried every single thing I posted?
    pretty much, i went through the entire list.

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    Registered User DiRty Impreza's Avatar
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    compression test, cylinder leak down, prepare yourself.
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    Moderator Donkey's Avatar
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    Quote Originally Posted by Subaru1229 View Post
    pretty much, i went through the entire list.
    Right,you checked the valve clearances and did a compression/leak down test?
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    It was exhaust valve clearance on mine. Mainly cyls 1,2, and 3 though. On mine cyl 4 was the closest to being in spec. After adjusting I haven't had a single misfire since. I have 130,000 miles.

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