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  1. #1
    Junior Member
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    Jun 2012
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    Default Turbo 5.3 False Knock

    Hello All!
    I am still a bit of a Noob when it comes to the programming aspect of performance, so I totally need some help from someone with more knowledge. I am posting this in the forced induction and the transmission section for two different issues.

    To start, this is a turbo (S366) third gen 5.3 with a GT2-3 cam and 2000 LS1B w/ COS 5. Its in a heavy 4x4 with a fresh SRTA 4L80E 2K stall and 3.73's

    I really think this cam is working against me, as I have nothing off the line, but the real question is where is my knock retard coming from? I hear no audible knock, and sometimes KR will appear without much throttle change, or will appear one time and not the other. I have 2 new resonant style sensors in the valley. I don't know if the center frequency is correct, its stock, so is the sensitivity. Should it be cylinder or engine mode? Power and mileage are down, and its just not as fun as a turbo should be! I have some trans tuning issues too, like shift points, but am approaching things one step at a time.

    Thank you for looking!
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