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Thread: 2008 half ton 5.3 PROBLEMS

  1. #1
    Senior Member
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    Default 2008 half ton 5.3 PROBLEMS

    Ok ive got a 2008 5.3 with a maggy super charger.It had no maggy base map,It did have a mail order tune in it but was very scary lean,Found had the wrong injector flow rate entered in,So i fix that and it seems to run decent not great but decent,do some pulls and has missfires.Go round and round with that swapping a good set of wires,re gapping plugs tighter for spark blow out and even tried a good set of coils off my own rig,no change.So i dig a bit deeper and notice no change in the ve table.So i disable the maff and pop the yellow wire from maff harness,ve table was very very lean.So I start making changes and get it pretty decent at idle and cruise,light load is ok heavy load still lean,So i continue to work with it and it started popping a p0068 p0108 and a p0102.Im pretty sure this is cause by to much diff between the map and tps readings.Can anyone please help me out with this dang thing.I did follow the steps on the e38 e67 maffless ve tuning setup.Ive been screwing with this thing for like 3 weeks now.And Im at my wits end.Thanks guys.

  2. #2
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    O and quik note im pretty green on these new ecus,so speak with small words so i can understand lol.Thanks guys.

  3. #3
    Lifetime Member GAMEOVER's Avatar
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    Aug 2008
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    I did a tune on a 2008 5.3ltr Silverado with a Magnacharger and I gave up on adjusting the 2 BAR VVE table, it kept changing were I didn't want it to...So I put the 1 BAR MAP sensor back on and I went OL-MAF and never looked back... So much easier & alot quicker...
    2008 2WD Ext.Cab Silverado 1500 6.0 V-MAX E38(L76) & T42(4L70E) MAF Only CL Corvette Servo AFE CAI INNOVATIVE LM-2 WBO2

    FLASHSCAN V2 & AUTOCAL

  4. #4
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    well this is stilla 1 bar map.

  5. #5
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    I just did a last year of old ecu/operating system with a maggy and cammed 6liter and it took me like 2 hours from a stock map to done.This truck im working on now is horrible.It does also have a cam and no afm.

  6. #6
    Senior Member Chuck L.'s Avatar
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    Feb 2006
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    Where is the fuel psi when this is happening?
    Chuck L.
    CODY Motorsports
    Fuel Injector Service
    Madison, GA.
    706-342-3152
    770-265-5144 [C]

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