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Thread: Help please!! What is wrong with my tune?

  1. #1
    Tuner in Training
    Join Date
    Mar 2020
    Location
    New Bedford, Ma
    Posts
    39

    Help please!! What is wrong with my tune?

    Hey fellow tuners! So I am new to tuning and trying to figure out what I am doing wrong. I have my rear O2's disabled because one of my sensors keeps throwing a code. The rest of the tune I've been trying to fix the parameters one by one but I feel like I am chasing my tail with airflow and timing. Any advice to where I need work? My mod list is in my signature.

    5-17 cruise to ventura dr.hpl

    TUNE STEP3.hpt
    2007 Chevy Avalanche LT 4x4
    Rough Country 7.5 Lift
    Engine:2 Bar LC9 5.3L Flexfuel DOD delete
    Volant Cold Air System, Ported Throttle Body, Jet PowrStat 180
    Summit Stage 2(8701) Cam
    Stock bottom-end
    Longtube headers, Cat-less y-pipe
    Trans: Mad Dog L3 4L70E

  2. #2
    Senior Tuner
    Join Date
    Mar 2011
    Location
    Ripley, MS
    Posts
    1,865
    The first step to get it dialed in is to disable the Virtual Flex fuel sensor. It's currently showing that you have 38% ethanol in your gas. I assume that you don't.
    Once you disable virtual flex fuel, then your fuel trims will be pretty close to where they need to be.

    Try this tune. It'll be much better than what you have.

    TUNE STEP4.hpt
    Last edited by kevin87turbot; 05-17-2020 at 11:02 PM.

  3. #3
    Tuner in Training
    Join Date
    Mar 2020
    Location
    New Bedford, Ma
    Posts
    39
    Quote Originally Posted by kevin87turbot View Post
    Thank you Kevin! ill try it tomorrow
    Last edited by WickedAvalanche; 05-17-2020 at 10:12 PM.
    2007 Chevy Avalanche LT 4x4
    Rough Country 7.5 Lift
    Engine:2 Bar LC9 5.3L Flexfuel DOD delete
    Volant Cold Air System, Ported Throttle Body, Jet PowrStat 180
    Summit Stage 2(8701) Cam
    Stock bottom-end
    Longtube headers, Cat-less y-pipe
    Trans: Mad Dog L3 4L70E

  4. #4
    Tuner in Training
    Join Date
    Mar 2020
    Location
    New Bedford, Ma
    Posts
    39
    Tried that adjustment and it was hiccupy so I tweaked a few things. Here is where it is now...Not sure why STFTs are so crazy.
    Attached Files Attached Files
    2007 Chevy Avalanche LT 4x4
    Rough Country 7.5 Lift
    Engine:2 Bar LC9 5.3L Flexfuel DOD delete
    Volant Cold Air System, Ported Throttle Body, Jet PowrStat 180
    Summit Stage 2(8701) Cam
    Stock bottom-end
    Longtube headers, Cat-less y-pipe
    Trans: Mad Dog L3 4L70E