stutter on WOT

Discussion in 'Mazdaspeed 3 General Discussion' started by automaticonlyspeed3, Apr 11, 2025.

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  1. automaticonlyspeed3

    automaticonlyspeed3 Silver Member

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    Hey guys. i need a bit of help here..

    I get stutter on WOT. its like a pulsing dadadada..
    car runs great normally!

    Ill post a log to help..

    few guesses.. I got a spark plug that seen better days.. but again, the car runs fine during normal driving.

    I might have a slight boost leak possibly..

    engine knock spiked up to 5 during WOT..

    not great with cars, but any help would be appreaciated.

    Stock engine,
    stock turbo.
    bought freektune, just didn't get around to tuning it yet. so cobb at the moment.
     

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    Last edited: Apr 11, 2025
    automaticonlyspeed3, Apr 11, 2025
    #1
  2. Easter Bunny

    Easter Bunny Professional Engineer Motorhead Platinum Member

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    1 don't run cobb it's tunes
    2 a boosted car doesn't like spark plugs that have seen better days. Could be as simple as tightening the gap back up

    3 fix the plugs and any boost leaks before starting the tune
     
    Easter Bunny, via a mobile device, Apr 11, 2025
    #2
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  3. automaticonlyspeed3

    automaticonlyspeed3 Silver Member

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    Thank you!

    Ill go out and re-gap it right now..
     
    automaticonlyspeed3, Apr 11, 2025
    #3
  4. automaticonlyspeed3

    automaticonlyspeed3 Silver Member

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    automaticonlyspeed3, Apr 14, 2025
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  5. Easter Bunny

    Easter Bunny Professional Engineer Motorhead Platinum Member

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    Glad to hear
     
    Easter Bunny, via a mobile device, Apr 15, 2025
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