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Thread: Negative Fuel Trims

  1. 2 Weeks Ago #1
    neps_automotive
    neps_automotive is offline
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    Negative Fuel Trims

    Whats going on everyone?! So I took a break from the forums to get some much needed training in the tuning world, and now I'm back with a pretty sound knowledge base, looking for some help...

    2005 Silverado, 5.3, Truck Norris cam. Tune is good, got all my idle and spark setup perfectly. The issue I'm having is, when I try to tune my MAF & VE, all my LTFT are in the negatives. Like, deep in the negatives. Keep in mind, it's a pretty cold day here in MI (our high was 42), but I don't think I should be that far off. I'm posting my log and tune file for some insight. Preciate yall!!!

    VE Tuning.hptMAF & VE tuning.hpl
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  2. 2 Weeks Ago #2
    blindsquirrel
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    You're not logging RPM, which is one axis of the VE table, so you'll get no useful data like that.
    GM Gen4 Injectors v2.1.xls
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