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Thread: Need help with a tune

  1. #1
    Fuel Injected! 1leg's Avatar
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    Jan 2012
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    Need help with a tune

    Need help to get me close. It seems that i can't keep this thing from running rich. I'm sure i'm missing something

    Here's a resent log from my 1989 v2500
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    Last edited by 1leg; 02-24-2013 at 05:31 AM.
    1993 RCSB 1/2, 350/4l60 Eaton locker 3.42-1. Drag truck ET 10.84 1/8mile. Build Thread
    1989 V2500 Suburban 350/th400, 4.11 gears, Tow truck, needs TBI 454 swap. Build Thread

  2. #2
    RIP EagleMark's Avatar
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    Look at your VE and Spark advance table in Graph mode, what do you see? Then use this bin to compare your Spark Advance and VE table. What do you see? Compare Stoich AFR. What do you see?

    Don't use this bin, it's wrong for your trans. Spark and VE1 would be a major improvement.
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    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  3. #3
    Fuel Injected! 1leg's Avatar
    Join Date
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    Thanks a bunch, And wow never really looked at the graphs before. I will burn a chip tonite and give it try tomorrow
    1993 RCSB 1/2, 350/4l60 Eaton locker 3.42-1. Drag truck ET 10.84 1/8mile. Build Thread
    1989 V2500 Suburban 350/th400, 4.11 gears, Tow truck, needs TBI 454 swap. Build Thread

  4. #4
    RIP EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    63
    Posts
    10,477

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

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