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Thread: 2006 5.3 Vortec GM truck with mild upgrades tuning help needed

  1. #1
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    Default 2006 5.3 Vortec GM truck with mild upgrades tuning help needed

    Hello, First time making an attempt at tuning a 5.3 vortec and this thing is a mess. It has pacesetter 3" headers and 3" all the way back. No Cat and just a pass through muffler.

    Extremely rich with stock file. Did some minor adjustments to the trq tables and turned off 02 sensors and now the thing runs worse then it did before. Extremely sluggish on initial throttle and creeps to 5000rpm to shift....

    Any Ideas of what I may have missed or should be looking at?

  2. #2
    Lifetime Member Chevy366's Avatar
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    Need logs to help .
    Without CATs it will smell rich , when it is not .
    2005 1500 HD , Custom OS3 SD tune .
    2006 Trailblazer
    Dinosaurs and Plants gave their lives so that we may drive , long live fossil fuel .

  3. #3
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    which tables do you need logged in the pid selection? If I just select the default will that be enough?

  4. #4
    Lifetime Member Chevy366's Avatar
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    Yeah , that will do for a start .
    Log + .tun file .
    2005 1500 HD , Custom OS3 SD tune .
    2006 Trailblazer
    Dinosaurs and Plants gave their lives so that we may drive , long live fossil fuel .

  5. #5
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    what torque tables did you adjust

    which o2 sensors did you turn off

    post starting .tun vs the .tun you have now.
    94 TransAm: LS1/a4 swap...98 OS. 237/242 603/609 cam (MS3). 3600 Converter, 2.73 gears. Full Exhaust
    98 Camaro: twin 61s (in progress)...

  6. #6
    Lifetime Member Aloicious's Avatar
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    do you have a wideband O2 sensor installed that you're logging as well?
    1996 c1500 gen1e 5.7L - the "LS31", 24x CNP, LS2 coils, modified T56, 12200411PCM running COS3, zz4 cam, custom MPFI, etc. coming soon: Twin Turbos

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