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Thread: Wierd VE spikes and knock.

  1. 10-21-2017 #1
    fctry286
    fctry286 is offline
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    May 2015
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    San Diego
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    Wierd VE spikes and knock.

    On the way home today I notice some wierd VE spikes not sure what would cause that. I am running maf only, I did tune the low side VE tables.
    and for what ever reason whenever I do a 4th gear roll pull I get knock around 4k-4600 but if I go from first gear on up no knock. would it just be added vibes from the truck and tires?
    2011 Sierra 5.3l,
    Dart 427 with a Big cam, Big intake manifold, Big injectors and a Big ass Turbo
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  2. 10-21-2017 #2
    fctry286
    fctry286 is offline
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    Join Date
    May 2015
    Location
    San Diego
    Posts
    66
    cant get the scan to load up. ill try again later.
    2011 Sierra 5.3l,
    Dart 427 with a Big cam, Big intake manifold, Big injectors and a Big ass Turbo
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