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  1. #1
    Join Date
    Mar 2015
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    Question Nissan S15 sputters / hesitates during full throttle

    Make a short story of this.
    Ran the car home to give it a wash. 1.5h later and good to go I noticed it started to sputter / hesitate during full throttle
    Now I been tried to fix this issue by change;
    Brand new plugs, bkr7e re-gapped to 0.7
    New fuel pump (from nissan r34 gtr)
    Coil pack
    All vacum lines
    Blocked BOV (if that made difference)
    Added a ground kit

    None of these helped at all.
    If turning off the boost controller to run stock boost at 0.7bar it runs fine, but turning up boost it start doing this funky sh*t again. Car have been tuned with apexi PFC incl the EBC set to 1bar / 14.x psi.

    By looking at the new plugs, 2of em are very white. So now im gonna go for a new fuel filter and try another set of injectors and MAF.

    Did any of you had similiar problem?
    Please help, running out of ideas

    Video;

  2. #2
    Join Date
    Dec 2013
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    Sounds like your losing ignition when it comes on boost

  3. #3
    Join Date
    Mar 2015
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    Any tip on what to check next?
    Any help appreciated!

  4. #4
    Join Date
    Oct 2009
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    West Midlands / South Wales
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    Coil pack mate!

    or plugs one or the other! mine was dodgy no.1 pack.
    zillalife
    Ashfab

  5. #5
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    Mar 2015
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    Plugs are brand new, gapped to .028 / 0.7
    I hope its not the coils. They are only like 10.000km old (Yellowjacket)
    What about the the plugs are white at the tip? My old ones arent

  6. #6
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    Feb 2015
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    Quote Originally Posted by tooley View Post
    Coil pack mate!

    or plugs one or the other! mine was dodgy no.1 pack.
    Another vote for coilpack

    Great vid btw, should help others that search out the problem. Usually happens worse when cold and car under greater load.

  7. #7
    Join Date
    Feb 2011
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    Chippenham, wiltshire
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    White at the tips usually means lean/no fuel. Got any pictures of the plugs? Injector issue? Over boosting?

    S15 spec R Pearl yellow - Sold
    New JDM wagon.... Nissan Cube Autech Rider

  8. #8
    Join Date
    Feb 2011
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    Also I run bcpr7es gapped to 0.7 although I've read bk's do fit but aren't as tall.

    S15 spec R Pearl yellow - Sold
    New JDM wagon.... Nissan Cube Autech Rider

  9. #9
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    Mar 2015
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    Thanks for all the tips.
    Turned out to be the coil-pack.

    Looking for another set of coil pack. Do you guys have any tip here?
    Wont be using YJ coils again. But what about splitfire?

    Thanks again!

  10. #10
    Join Date
    Jan 2014
    Location
    Gloucester
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    Nissan S15 sputters / hesitates during full throttle
    @S15_wot
    i had this problem, couldnt get round to what it was, it ended up being the coilpack harness!

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