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Thread: 99 Silverado twin turbo 4l80e first start up

  1. #1
    Tuner in Training
    Join Date
    Apr 2009
    Posts
    25

    99 Silverado twin turbo 4l80e first start up

    truck mods are
    Speed density 2 Bar
    408 LS
    L92 CNC heads
    VS Racing 78mm turbos
    235/235 620 118 lsa
    ebay LS3 Fabricated intake
    ebay 92mm trottle body
    Bosh EV14 60lb injectors
    4L80e transmission swap

    ok i have this problem when i go into gear it wants to die the RPMs get really low in the 300rpm range. like if its choking the engine or the ecu dont know its in gear. truck fires up fine and go threw the RPMs fine with out any problem. its just when i go in gear.
    i dont know whats going on im thinking its my ebay trottle body i had to grind on IAC sensor for it to work
    __________________
    start up idle and in gear. problem
    and tune file

    Fastlane Black 1999 Silverado TT PG tune 1 2 bar vats disable.hpt
    first idle_gear log_5_21.hpl
    Last edited by BlownChevy'06; 05-21-2015 at 10:40 PM.

  2. #2
    Tuner in Training
    Join Date
    Apr 2009
    Posts
    25
    any one has anything in mind any tips.

  3. #3
    Tuner in Training
    Join Date
    Apr 2009
    Posts
    25
    anyone can take a look at my tune