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Thread: timing problem?

  1. #1
    Tuner in Training
    Join Date
    Jul 2016
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    18

    timing problem?

    So I felt like I had a fairly decent tune put together, truck runs very well on it, just a little more smoke than I want. I assume that's just fine tuning in the boost limiting table. Anyways, I datalogged it and noticed that the truck is following the low air Dens steady state timing table. I used the timing calc on another thread to put in for a 50/50 split throughout. I loaded this tune onto the truck, let it get up to operating temp, and then when I drove it as soon as I got into third gear and mashed it the truck hit maybe 1500 rpms and made a popping noise and fell on its face. Is that railpop then? or a misfire? just trying to figure out what the problem was so that I can get it fixed and flashed to the truck. Also any other advice is great guys, thanks.

    TuneAttempt1-edit(2)_(smokefix).hpt

  2. #2
    Tuner Turbo_Mike's Avatar
    Join Date
    Feb 2016
    Location
    Putnam, CT
    Posts
    130
    I don't see anything that will make it do that. Log rail pressure, then you will know. When you pop the rail relief, you will see it. I doubt that's the problem at 1500 rpm though.
    2003 305/555 QCSB Cummins
    Piston/rod/sleeve/fire ring/dual CP3/300 overs
    Super Stick NV5600
    S366/S480

  3. #3
    It's most likely a timing issue. Look at your pilot timing adders

  4. #4
    Tuner in Training
    Join Date
    Jul 2016
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    18
    I talked to some other guys and im thinking its too much pilot timing. Unfortunately I wont get to mess with the truck for a while but ill see if that's it.