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Thread: S14a misfire under boost

  1. #1
    Guest d9lxw's Avatar
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    S14a misfire under boost

    Hi,
    Iíve just bought a 200sx S14a just over a week ago and over the past few days itís developed a misfire when you get on boost around 7psi or so. Iíve changed the plugs and cleaned the MAF with electronics cleaner with no apparent affect. Has anyone else had this issue? Or any other pointers? Iím incredibly new to nissans and older cars in general.
    Cheers.

  2. #2
    Guest hooky's Avatar
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    Its either a coil pack or the plug gaps need closing up.
    Coil packs are a very common failure.

  3. #3
    Now with 400bhp....
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    Most likely coilpack, had the same symptoms from a loose plug but doubt it’s that if you’ve swapped them.
    South west Events and local meet info. See here


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  4. #4
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    Don't discount the coil pack harness either. It's old. Very old.

  5. #5
    Guest Drifter's Avatar
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    Check the coil pack loom earth that goes to the back of the head as well


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