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Thread: Cutting out/misfire when coming into boost

  1. #1
    Junior Member
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    Default Cutting out/misfire when coming into boost

    When i start getting into boost (approximately between 3-6psi), I notice a significant drop in power and what feels like a misfire. No misfires are being logged and the problem just started recently. I have not changed the setup or tune on the truck it just appeared after hitting 10 psi. I performed a calflash of the same tune and the problem is still here. Performed a boost leak test and found no leaks. Any ideas?tt2.ctzLS1B_0066.efi

  2. #2
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    2001 Silverado 4.8l
    Twin 60mm t3/t4 turbos
    TH400 transmission
    Drive by wire
    No MAF/ running speed density 2 bar map sensor(AC Delco 213-1631)
    No cats
    No EGR
    No EVAP
    No Secondary Air
    Delphi 12613412 injectors (50lb @ 4 bar)
    fuel system is a stock return type fuel system
    static frp with no reference is 56 psi

  3. #3
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    What plugs and gap

  4. #4
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    Ngk 4177 @ .030”

  5. #5
    Lifetime Member
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    Dec 2014
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    TR6. Spark blowing out? Look at some br7ef for higher boost.

  6. #6
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    I’ll give that a shot. And replace the plug wires with better ones.

  7. #7
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    Update, replaced the plugs and found the problem.
    Plug wires only have about 100 miles on them. Gonna have to reroute.
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