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Thread: 2004 Tahoe no low end.

  1. 03-23-2012 #1
    wheezer
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    2004 Tahoe no low end.

    Getting around to tuning my wife's Tahoe after I completed my GP GXP tune
    I've only tuned the MAF, haven't done VE yet and haven't moved my wideband over to it (not sure if I really want to).

    The tahoe is bone stock 4.8l. The issue I'm having is when you mash the gas at a stop it just feels like you're just accelerating from a light normally. Coming off a stop at part throttle feels faster. Once it get's into the 3500-4000rpm range it feels like a completely different vehicle. Revs fast and gets to scootin'

    I think I've taken out all the torque management and set the ETC to no delay in max rotation.

    It just feels like it's bogging down until the rpms get into the LS sweet spot.

    What am I missing?
    Last edited by wheezer; 03-23-2012 at 10:48 AM.
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  2. 03-23-2012 #2
    2xLS1
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    That's what going from 24* timing to -5* timing will feel like. Look at your burst knock.
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  3. 03-23-2012 #3
    wheezer
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    Got it! I knew I was missing something. Zeroed out Burst knock and bumped the timing up. Now just working on getting the last bit of KR out. Feels like a different vehicle.
    I think the cat is going out too. Looking at O2B1S2, shouldn't that stay somewhat steady?
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