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Thread: 2007 2500HD help needed

  1. #1

    2007 2500HD help needed

    I bought my 2007 Silverado 2500HD Classic in December. It was bone stock with 24,500 miles.

    Mods since are:
    cam, springs, keepers, locks and 7.4 pr's
    TVS1900 Magnuson s/c
    Headers, catted mids and a magnaflow muffler
    Wideband and fp gauges
    custom tune

    Data logging detects knock. So we recently pulled the heads and replaced the lifters with GM replacements. Definitely got quieter but we still have issue's.

    The truck has a custom tune, but the tuner has decided that I should look for a new tuner.

    Truck runs RICH. AFR's jump to 10.0 at the touch of the throttle. HPT senses knock when the truck needs to downshift and doesn't or just prior to an up shift.

    I NEED HELP. I have a truck that I bought and modded to be my tow vehicle. I have a brand new 24' trailer that has never been hooked to the truck.

    Can someone look at this tune and log file, and suggest a tuner? I have HPT but to say I am a novice is putting it mild.

    Thanks, Tom
    Last edited by tom's2005gto; 04-17-2012 at 06:38 PM.

  2. #2
    Advanced Tuner vette_c6's Avatar
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    in your scanner log you are getting to Rich and you are having KR

    your PE enable is 35%
    so everytime you are hitting your throttle 35%
    you are entering WOT

    for your downshift and upshift ,, enter your wheels and tires size with the Ratio
    then Click on commit
    that should get it back to resonable thing

    adjust your timing table ,,

    good luck

    specialize in: V8 Tuning (Kuwait)
    Abdullah Al-najdi
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  3. #3
    ^^^^ PE = Power Enrichment?

    Regarding tranny, I think the factory stock tranny files were put back in.

    As stated, I am a novice at this. I have contact a tuner that has reviewed the files and see areas to address. Hopefully we will see some changes soon.

    Thanks for looking at the files. I'll post up results.

  4. #4
    Senior Tuner IDRIVEAG8GT's Avatar
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    Aug 2010
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    Roswell, N.M.
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    1,956
    You only want PE when you're in boost. Power Enrichment that is.

    Under Engine>fuel>power enrich, set MAP enable to 93kPa, set MAP Hyst to zero, rpm enable to 500, Hyst to zero, and then set your TPS Enable to 5 across the board.

    Make sure your PE Multiplier is 1.260 across the board.

    Disable Burst Knock Retard.

    Go about tuning normally via your MAF.
    Gray Ghost- The abomination. 2007 Chevrolet Silverado CCSB. 98mm turbo, nitrous, 428LSX, Rossler 80E with a brake. Finally finished. 23 psi, no numbers, Slow as hell.

    PBM G8- Aluminum 364, twin Precision 67/66 turbos, 6L90 trans swap, CTS-V/Vaporworx fuel system, slowly making progress.

    Dads 2011 CTS-V- Stock bottom end, stock heads, LS9 cam, pullies, ported blower, ported TB, D3 goodies, and lots of nitrous.
    618/618 motor
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    Caterpillar 50 Forklift- Duramax swap

  5. #5
    Tuner in Training
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    Jul 2008
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    10
    Where are you located?

  6. #6
    Quote Originally Posted by evotune5 View Post
    Where are you located?
    Nashville, Tn. I have begin remote tuning with Klug Performance and knock has been eliminated. I actually did my first wot run today. I think we are just about there!