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Tune problem 04 gto

This is a discussion on Tune problem 04 gto within the Computer & Tuning forums, part of the LSx Technical Help Section category; First off, Ive been reading up on this forum for some time and there is a lot of good info ...

  1. #1
    Junior Member
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    silver
    2004 gto

    Exclamation Tune problem 04 gto

    First off, Ive been reading up on this forum for some time and there is a lot of good info on here and I hope someone can help me out. I have loaded the Diablo performance tune on my 04 gto. When I set my injector slope to -15 to get my LTFT to 0, It throws code bank 1 and 2 both running lean. Only mods include K&N intake, BBK 80mm TB, Weiand intake manifold, E3 plugs, MSD wires, Shorty headers and flowmaster cat back system. If I leave the tune as is LTFT 15 to 20 with no adjustments to injector slope no code no problem. Can anyone help me out!!!

  2. #2
    Just another Joe Eagle's Avatar
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    Pewter
    2002 WS6

    Never used a Diablo before, but why would you be leaning the tune out when you clearly have mods supporting more airflow?

    Have you put it on a wideband to see what your actual AFR is? Tuning by LTFTs can be a pain sometimes...

    -Eagle

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    silver
    2004 gto

    tuner problem 04 gto

    I was told going negetive on the LTFT's tells the computer to send more fuel because it thinks the injectors are smaller. they will set at 0 but the car will in turn be to lean. I was thinking about puttin this thing on a dyno for tuning

  4. #4
    Member The Silver Goat's Avatar
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    Qucik Silver Metalic
    2004 GTO - M6

    Quote Originally Posted by Bmoregto View Post
    I was told going negetive on the LTFT's tells the computer to send more fuel because it thinks the injectors are smaller. they will set at 0 but the car will in turn be to lean. I was thinking about puttin this thing on a dyno for tuning
    Going negative adds fuel. Your logic is accurate.

    Check for air leaks everywhere. I had the same problem when I modified my MAF and was the system apart a lot. I checked every clamp from the filter to the intake and found the second clamp at my intake to be loose. (the one connecting the tubing to the intake) I use a touch of lock tight on each now to make sure nothing on the works itself free.

  5. #5
    Veteran 0rion's Avatar
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    what are you ltft's before you make the adjustments?

  6. #6
    TunedbyFrost.com Tuner Frost's Avatar
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    realize that when you use that chainsaw for surgery, you are affecting ALL fueling, startup, OL, idle, cruise, and yes, WOT.

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