Thread: Possible false knock?

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  1. #1 Possible false knock? 
    SE Level Member MillCityGTP's Avatar
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    Hey everyone! I finally got my **** together and got a bunch of stuff in at once. I pullied down to a 3.5 with the mods in my signature. Car runs great but I do still see knock especially if I'm heatsoaked. The bigger issue is that I see it occasionally build and fall off if I'm accelerating at low RPMS, light throttle even if I'm not in boost. Could this be false KR?
    2003 Pontiac Grand Prix GTP Limited Edition
    ZZP MPS w/3.5" - 3" DP - Front and Rear ZZP Powerlogs - 4" Intake - 180* stat - 104's - GMPP Front and Rear STB's - ZZP Poly Mounts - ZZP Coils - Overkill Tuned - 17x7.5 Bonneville Lace Wheels
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  2. #2 Re: Possible false knock? 
    Turbo is the way to go. BillBoost37's Avatar
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    False KR is a bit of a myth.

    If the pcm shows you KR, then it sees knock. Mechanical, loose part or predetonation... it's your job to find and fix it.

    Most likely it's too small of a pulley for your mods.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  3. #3 Re: Possible false knock? 
    SE Level Member MillCityGTP's Avatar
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    I was concerned about that, was contemplating upping the pulley to a 3.6". Its just odd because it can be sporadic and sometimes its worse than others. Thanks for the help. I need longevity out of this setup, as its my DD.
    2003 Pontiac Grand Prix GTP Limited Edition
    ZZP MPS w/3.5" - 3" DP - Front and Rear ZZP Powerlogs - 4" Intake - 180* stat - 104's - GMPP Front and Rear STB's - ZZP Poly Mounts - ZZP Coils - Overkill Tuned - 17x7.5 Bonneville Lace Wheels
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  4. #4 Re: Possible false knock? 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    I've seen the torque converters cause this, it's trying to stay locked at a lower speed and that can show as knock.

    SMGPFC Member #1
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