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    2008 Tahoe Fuel Delivery Issue?

    New spark plugs and wires about 6 months ago. They all still look fine today.
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    2008 Tahoe Fuel Delivery Issue?

    I'm not equipped to do this sort of stuff. I am only a little over an hour from Detroit though.
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    2008 Tahoe Fuel Delivery Issue?

    No worries lol, I need all the input I can get. So far this issue has eluded several mechanics. If you're just casually cruising around it drives just fine like there's no issue. It's only if you accelerate hard or go WOT that it occurs. I swear this vehicle is a mystery box of unfortunate wonders.
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    2008 Tahoe Fuel Delivery Issue?

    I wish my issue would have been resolved by some injector cleaner lol. I've tried that & I run 93oct gas since that is what my tune is set for. When I'm driving and try to go WOT that's when my engine bogs down and spits & sputters, very intermittent too.
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    2008 Tahoe Fuel Delivery Issue?

    I've been pondering the thought that it could be an intake issue. It has a new intake gasket on but as for the rest I'd have to check. I've been debating on just replacing the manifold. Think it'd be worth it to change the intake manifold out + MAP sensor just to rule them out?
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    2008 Tahoe Fuel Delivery Issue?

    No I didn't re-use any of the old downstream sensors. I actually just put new upstream O2's on a couple weeks ago.
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    2008 Tahoe Fuel Delivery Issue?

    I'll have to look into getting it scanned w/ a Tech2 but, as far as O2 sensors go - I only have Bank 1/2 Sensor 1 for each side as the rest were deleted/removed when I put my exhaust on. The downstream sensors were disabled via the tune.
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    2008 Tahoe Fuel Delivery Issue?

    5.3L & yes it is flex fuel equipped.
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    2008 Tahoe Fuel Delivery Issue?

    I'd have to ask him for clarification on that but this is becoming quite the nightmare vehicle.
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    2008 Tahoe Fuel Delivery Issue?

    No set codes when it does this but - the CEL does come on and flash until you let off the pedal. The mechanic did say he watched it command fuel but not get it and it went lean. He stated he had it hooked up to a laptop. Like you stated, everything else seems to respond like it should it just...
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    2008 Tahoe Fuel Delivery Issue?

    The thought has crossed my mind to get one - I just haven't pulled the trigger. With the issue being so intermittent it makes me think it's an electrical issue. Been to three different mechanics and none can pin point the issue. As far as the TSP sensor goes - I'm not sure if they have 1 or 2.
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    2008 Tahoe Fuel Delivery Issue?

    MAF has been cleaned and checked as well, I do not personally have a scan tool but my local shop has had the Tahoe hooked up the last couple days scanning over everything. I've replaced a couple ground straps and the battery cables as well. Put a new battery in today actually.
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    2008 Tahoe Fuel Delivery Issue?

    $0 out of pocket expense on the trans thanks to a 3rd party warranty. Fuel pressure & pump checks out, was one of the first couple things checked by my mechanic. Strictly Performance Motorsports in Kalamazoo MI did the tune.
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    2008 Tahoe Fuel Delivery Issue?

    First post on here.. hoping someone may have some knowledge as to what may be going on. I have a 2008 Tahoe LTZ, bought it with 86k miles on it February of last year. Since then, I have had intermittent issues where under hard acceleration or WOT it spits and sputters, goes nowhere in a hurry...

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