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Thread: L96 C10 Swap Both banks lean

  1. 07-18-2022 #1
    Simonj
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    L96 C10 Swap Both banks lean

    Hey everyone, I am having an issue with my 6.0 swap. Both banks are lean (LTFT max @25) at idle. I have done a smoke test with no leaks, when I get on the throttle it balances out. Now I have a misfire on cylinder #5, I replace all injectors, changed plugs, coils, and wires. My tune is attached. Any ideals of what going wrong.
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  2. 07-18-2022 #2
    5FDP
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    Stock everything on this swap too?

    What is your fuel pressure?

    Somebody modified the injector flow rate to a solid 50lb/hr too.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.
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  3. 07-18-2022 #3
    Simonj
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    Everything is stock, and fuel pressure at the rail is about 50lbs. I don't have a wideband so I'm reading off of narrowband.
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  4. 07-18-2022 #4
    5FDP
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    What style fuel system is it and did you replace the injectors with stock size units?

    I ask this because the stock fuel system is returnless and the stock injectors are rated around 50lb/hr at 58psi of pressure. So if your fuel system is different and you aren't running the same pressure and your injector data is incorrect, that could/will be a cause for a fueling problem.

    Also if the MAF sensor is put in a different size tube that stock, that will throw things off because most people are not running the stock airbox on swap vehicles.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.
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  5. 07-18-2022 #5
    Simonj
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    The system is returnless and the injectors are stock, I will take a look at my fuel flow rate now. I have a after market MAF tube, didn't think about that. thanks
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  6. 07-19-2022 #6
    Alvin
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    This just looks like a tuning issue.. You'll have to calibrate for how you have the MAF mounted etc.
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    Email tuning!!!, Mail order, Dyno tuning, Performance Parts, Electric Fan Kits, 4l80e swap harnesses, 6l80 -> 4l80e conversion harnesses, Installs
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  7. 07-19-2022 #7
    Simonj
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    Alvin,

    Is this something you can do with your emailing tuning service?
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  8. 07-20-2022 #8
    Alvin
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    Yes we do things like this all day long. www.pcmofnc.com.
    Tuner at PCMofnc.com
    Email tuning!!!, Mail order, Dyno tuning, Performance Parts, Electric Fan Kits, 4l80e swap harnesses, 6l80 -> 4l80e conversion harnesses, Installs
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