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Thread: Not getting maximum duration?

  1. #1
    Senior Member 2006Cummins's Avatar
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    Default Not getting maximum duration?

    I have my max duration set to 3200us, and when logging the tune at wot I am only seeing 2800us. When using the highlighting tool while watching the log, it highlights 3200us. I don't see any limiters, or anything else, that could be causing max duration to come up short. Anyone care to take a look and see if you can give me a hand?

    Tune:
    409_T8_0012.ctd

    Data log:
    t8-10 5th wot.efi

    Mike
    2019 Ram 6.7L 68RFE
    2003 VW Jetta TDI

  2. #2
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    i dont know how to repost your file back up but i made a change to your main injection pulse. nothing big, but i think the issue was you were commanding between 2900-3200us between 150-160mpa and 2500-3200us between 120-140mm3. I by no means am a big time tuner, but i did stay at a holiday inn express last night...

  3. #3
    Lifetime Member 2007 5.9's Avatar
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    Did you disable the pulse limiter option??

    Didn't look at your tune...
    Les Szmidt
    2007 5.9 Dodge Ram
    2014 Ram 3500 Aisin tuning Emissions Equipped
    EFI Live Cummins BETA Tester
    Silver Bullet Tuning
    silverbullettuning@gmail.com
    www.youtube.com/ljszmidt
    http://www.facebook.com/SilverBulletTuninig

  4. #4
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    Default

    yeah, he disabled it

  5. #5
    Senior Member 2006Cummins's Avatar
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    Default

    Did you disable the pulse limiter option??
    Yes, thanks.

    i dont know how to repost your file back up but i made a change to your main injection pulse. nothing big, but i think the issue was you were commanding between 2900-3200us between 150-160mpa and 2500-3200us between 120-140mm3.
    So, did you just change 150-160mpa, and 120-140mm ranges, to 3200us?

    I by no means am a big time tuner, but i did stay at a holiday inn express last night...
    Can't argue with that then. lol

    Mike
    2019 Ram 6.7L 68RFE
    2003 VW Jetta TDI

  6. #6
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    kind of. are you trying to get 180mpa? i see in your sig that you have an aftermarket pump. if so, change the the 2466 and 2544 in the 120mm3 row to 3150 and 3175. leave the 3200 alone in the 140mm3 row. should do the trick. hope thats the issue.
    Last edited by olboyowl; December 22nd, 2011 at 07:57 AM.

  7. #7
    Senior Member 2006Cummins's Avatar
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    are you trying to get 180mpa?
    No. I was trying to stay under that.

    I'm making some progress. Looks like there are a couple of issues. I've got one more thing to try which I'm hoping will take care of it. I'll let you guys know.
    2019 Ram 6.7L 68RFE
    2003 VW Jetta TDI

  8. #8
    Junior Member chance cobb's Avatar
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    did you get the bugs worked out ?

  9. #9
    Senior Member 2006Cummins's Avatar
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    Sorry it's been taking me a while to get back to this - It's been a little busy with the holidays. I set all of my limiters to efi's maximum. Now it actually reaches 145mm, which gave me another 100us. I think that it was the boost table that allowed this. Don't know why it goes to 145mm when my duration table only goes to 140mm, but that is another discussion I guess. I then lowered my pressure table to a maximum of 160mpa, which gave me an additional 200us. My actual rail pressure was a little higher than the desired, and was hitting the limiter which would pull fuel. Next I added duration to the 120mm range and have yet to data log. I am still about 200us under my commanded level, so I am curious to see what this last change will do. Thanks to everyone who has offered help - it is much appreciated. I will post more results soon.
    2019 Ram 6.7L 68RFE
    2003 VW Jetta TDI

  10. #10
    Senior Member DODGE74's Avatar
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    Mike,
    are you running the latest candidate 7 software?
    Reason I ask is because when I switched over from the August software I was also having some issues with fuel limiters and a few other things.
    I went to the dealer, got a fresh flash and now all is perfect.
    06 QCLB, DRW
    Single pump
    Single turbo
    EFILive 772hp 1398tq

    gordon@innovativediesel.com

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