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Thread: engine reved up on its own?

  1. #1
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    Default engine reved up on its own?

    Hello to all, This is my first post on efi live forum. Thanks in advance for any help.

    I have a 2007 dodge 3500. built trans, twins, and all the supporting mods. I have been tuning now for a while on it but this morning it reved all on its own. I have a log that I caught it on. How do I post my log file and tune file for yall to look at?
    thanks, chris
    2007 dodge ram 3500 larmie 5.9, built trans, twins, efi

  2. #2
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    [ATTACH]20655

    [/ATTACH]tune18, idle rev on its own, cropped.efi
    Attached Files Attached Files
    2007 dodge ram 3500 larmie 5.9, built trans, twins, efi

  3. #3
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    okay, maybe that will work

    PS, i was trying some new things on #5
    2007 dodge ram 3500 larmie 5.9, built trans, twins, efi

  4. #4
    Lifetime Member Move'n Up's Avatar
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    So this tune worked fine prior to your last edit?
    2006 Ram 2500 4x4, 5.9 CTD, Laramie, QC
    Fully Built 48RE, Billet Flex Plate, Triple Disc TC, 62/65 HE351cw
    2017 Corvette 3LZ Z06 M7 with Z07 Package

  5. #5
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    yes, if you look at the log, it was on csp#4. The only thing I saw was I forgot the change the pilot timing base air density table. I am only using pilot below about 1500
    2007 dodge ram 3500 larmie 5.9, built trans, twins, efi

  6. #6
    Member arinkuddy's Avatar
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    so im looking at the log and right before it revved up it looks like it was loosing rpm and adding mm3 to try get it back up.. for some reason the pilot timing was getting really low... the tune and log seem to not match pilot timing...(im looking at tune 4) and also the pilot timing in the logs are actually BTDC

  7. #7
    Member arinkuddy's Avatar
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    ahhhh thats your problem... i see it now in the log if plot pilot DURATION it goes to zero before the surge
    Last edited by arinkuddy; January 18th, 2017 at 08:15 AM.

  8. #8
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    I wonder if me having the pilot timing base air density table zeroed and the base pilot table oem level made it do that? It scared the crap out of me, I was in the shop and heard my truck rev hard and thought someone was stealing it. Had to run out side and check
    2007 dodge ram 3500 larmie 5.9, built trans, twins, efi

  9. #9
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    here is my best tune yet, stock fuel. What do yall think?

    #17.ctztune 17, full run1.efi
    2007 dodge ram 3500 larmie 5.9, built trans, twins, efi

  10. #10
    Member arinkuddy's Avatar
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    it must interpolate between the two tables and if it called for 0 deg of pilot timing then it just skips firing pilot all together or shortens the pulse... good rule of thumb to make both tables the same that way you dont get unexpected results... interesting find tho

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