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    At my wits end with P0303 cylinder 3 misfire code

    Indeed - I will do that tomorrow. Thanks so much. Worth a shot.
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    P0301, P0302, P0303, P0304, P0305, P0306 (the dreaded misfire) and how I solved it

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    At my wits end with P0303 cylinder 3 misfire code

    Just replaced complete exhaust system and O2 sensors. Still with the misfire. Can't find any chaffed wires. Replaced the plugs and coil pack. Checked compression (good). Replaced all injectors and installed the heat soak insulators. Replaced the exhaust manifold heat shield. I guess I'll...
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    At my wits end with P0303 cylinder 3 misfire code

    Indeed Sir.
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    The Official Jeep Wrangler TJ Oxygen (O2) Sensor Thread

    Yep - thanks.
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    At my wits end with P0303 cylinder 3 misfire code

    I was thinking that may be one of my next moves. Since you mentioned it - I just ordered 4 new O2 sensors. I'll try them first. Thanks.
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    The Official Jeep Wrangler TJ Oxygen (O2) Sensor Thread

    Ok, I just ordered the NGK's for my 2005 TJ. Amazon said the #23159 wouldn't fit - I read a few reviews and ordered it anyway. Fingers crossed.
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    At my wits end with P0303 cylinder 3 misfire code

    I've been throwing parts at my 2005 4.0 for a few years now. Today I replaced all 6 injectors and plugs (though I knew it didn't really need it). No luck. I've replaced damn near every sensor (all quality parts - no cheap China crap), the coil, the PCM, drove with the hood off as an...
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