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Thread: knock in 2nd gear steady accel. log file

  1. #1

    knock in 2nd gear steady accel. log file

    I sometimes get knock while accelerate through second gear lightly off a light. I can go WOT and never get knock, but slowly accelerate, and I sometimes get knock.
    Can someone please look at my log file please?

    about half way through is the knock
    04 Carbon Metalic GMC SIERRA ECSB- 5.3L, 3.73 locker, loaded
    tint, dark silver metalic spray-on bedliner
    15.500 @ 86.68 -STOCK

  2. #2
    why?? is it false knock? true knock?
    04 Carbon Metalic GMC SIERRA ECSB- 5.3L, 3.73 locker, loaded
    tint, dark silver metalic spray-on bedliner
    15.500 @ 86.68 -STOCK

  3. #3
    anyone? please?
    04 Carbon Metalic GMC SIERRA ECSB- 5.3L, 3.73 locker, loaded
    tint, dark silver metalic spray-on bedliner
    15.500 @ 86.68 -STOCK

  4. #4
    Senior Tuner Russ K's Avatar
    Join Date
    Dec 2005
    Location
    Regina, Sask.
    Posts
    4,214
    A couple of degrees of spark knock is normal. All stock vehicles have some spark knock.

    Russ Kemp

  5. #5
    should I reduce the timing? I run 93 in it, and its still stock timing tables
    04 Carbon Metalic GMC SIERRA ECSB- 5.3L, 3.73 locker, loaded
    tint, dark silver metalic spray-on bedliner
    15.500 @ 86.68 -STOCK