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Thread: A little tune help please! I need to lean out a little

  1. #1
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    Default A little tune help please! I need to lean out a little

    The tune I am currently running is attached below. when I pull my boat or just driving down the road I blow to much smoke in 5th or 6th. My 6th gear rpm range cruising down the road is 1500-1600, so if you roll into the pedal she starts puking a cloud of black smoke. If I don't down shift to bring the Rpms up I will cover traffic with Coal smoke. What do I need to tweak to lean this out?


    LBZ
    No EGR
    PPE fuel rail with dead head plug
    Fast 150 lift pump
    built trans, billet converter
    4" strait exhaust

    LBZ_180hp_ecm_0000#3.tun

  2. #2
    Lifetime Member Mitco39's Avatar
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    B0797 - you could turn that on and it would give you control of the smoke limiting tables to dial out the smoke as needed. Or pull PW from your main injection pulse from 40-100mm3

  3. #3
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    This is what it is set at now

    Click image for larger version. 

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  4. #4
    Lifetime Member Mitco39's Avatar
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    Yeah you got to lower B0797 so that it allows the truck to monitor your AFRs (which should work, dunnow cant say Ive actually played with it myself). I usually just tweak other areas of the tune to cut on smoke.

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    Gotcha, now I need to figure out how to do it.

  6. #6
    Lifetime Member Dmaxink's Avatar
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    Add more boost in a linearizing flashion into the rpm/mm3 area that the truck is smoking. This will add air into the mix and help clean up the smoke.

    Messing with the lean/rich parameters will not grant you the results your looking for. I suggest logging the problematic area and adding in more boost. Too much desired boost will set a under boost code if actual can't meet your command.

    Good luck!
    -kory
    -Kory

    I'm out of ideas? Nah trick... When in doubt, 0xFFFF it out!

    http://www.PPEI.com/

  7. #7
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    Dmaxinc, I am still a novice to Efi can you help walk me through this procedure? Without much tune time on my new LBZ Duramax engine I would worry to death that I did something wrong and I am hurting it. The tune I am running is a 180hp but it needs some tweaking for sure.

    PS: the boat I haul is not very heavy ( 21' Flatscat ) boat and trailer are maybe 3500#

  8. #8
    Lifetime Member Dmaxink's Avatar
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    First step is get rid of the 180hp tune wherever it came from and start with a stock tune and make small changes
    -Kory

    I'm out of ideas? Nah trick... When in doubt, 0xFFFF it out!

    http://www.PPEI.com/

  9. #9
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    Made a few changes.

    Let me know if this is helpful.
    Attached Files Attached Files

  10. #10
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    Where did that tune come from?

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