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Thread: LTFT help

  1. #1
    Junior Member eacostad's Avatar
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    Default LTFT help

    Just started tuning my 07 LS2 corvette, I have done the MAF Calibration and IAT Compensation. Car is basically stock except K&N cold air kit, catless Long tube headers, and Borla exhaust. My LTFT's are very rich now at idle do i need to do the VVE to get them back down to acceptable levels?
    Attached Files Attached Files
    2007.5 Silverado 2500HD Duramax, EfiLive Tuned, Airdog 150, MBRP dpf&cat delete exhaust

  2. #2
    Joe (Moderator) joecar's Avatar
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    Default

    It may easier to first correct the MAF table(s).

  3. #3
    Junior Member eacostad's Avatar
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    Ok I'll take a look at them again, thanks
    2007.5 Silverado 2500HD Duramax, EfiLive Tuned, Airdog 150, MBRP dpf&cat delete exhaust

  4. #4
    Junior Member eacostad's Avatar
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    redid my MAF calibration after and this time they started off rich like before but after a short drive seem to have settled down. heres the log and retune. What else can i do to fine tune it?
    Vette1_MAF_Calibrated.ctz
    Vette1_LOG_2.efi
    2007.5 Silverado 2500HD Duramax, EfiLive Tuned, Airdog 150, MBRP dpf&cat delete exhaust

  5. #5
    Junior Member eacostad's Avatar
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    heres my latest tune and log

    Log7_24.efi
    LS2vette.ctz
    2007.5 Silverado 2500HD Duramax, EfiLive Tuned, Airdog 150, MBRP dpf&cat delete exhaust

  6. #6
    Junior Member eacostad's Avatar
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    Open Loop tuning tune

    VVEtune_1.ctz
    2007.5 Silverado 2500HD Duramax, EfiLive Tuned, Airdog 150, MBRP dpf&cat delete exhaust

  7. #7
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by eacostad View Post
    redid my MAF calibration after and this time they started off rich like before but after a short drive seem to have settled down. heres the log and retune. What else can i do to fine tune it?
    Vette1_MAF_Calibrated.ctz
    Vette1_LOG_2.efi
    Sorry, I did not see this post.

  8. #8
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by eacostad View Post
    heres my latest tune and log

    Log7_24.efi
    LS2vette.ctz
    Quote Originally Posted by eacostad View Post
    Open Loop tuning tune

    VVEtune_1.ctz
    Ok, I'm looking thru these files...

  9. #9
    Junior Member eacostad's Avatar
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    Thanks for taking a look joecar, I added a ported throttle body and intake to the car which is why I started tuning the vve table. I'm using the Swingtan guide. My ecm doesnt seem to like getting reflashed as my car always goes extremely rich after each flash. I'm having to pull the ground off the battery to get the ecm to reset then the trims look good.
    2007.5 Silverado 2500HD Duramax, EfiLive Tuned, Airdog 150, MBRP dpf&cat delete exhaust

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