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Thread: Commanded Fuel Pressure

  1. #1
    Junior Member
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    Default Commanded Fuel Pressure

    I was logging a 6.7 tonight and noticed some varying readings. When first logging the truck ran smooth and the balanced vs uncompensated rates were very close. 2nd log the truck would stumble right after a shift. Rates were almost consistently off by 15 units. Logged the truck again and it started slightly off then pretty much matched back up. No more stumbling. We never even shut the truck off in between logs. I was just messing around with different pids. What makes up the differences in these 2 readouts? Is it a sign of regen? Anybody else notice this?
    07.5 2500 Dodge Twin Turbos, Dual Pumps, Deleted, 100% over nozzles, Fletcher Bump Stick, and more goodies, Awaiting EFI Live Tuning

    05 2500 Chevy Duramax, EFI Live Tuned

    01 2500 Chevy Duramax, ZF6, EFI Live Tuned

  2. #2
    Lifetime Member Dmaxink's Avatar
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    I'm not fully understanding.. care to post the log?
    -Kory

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

    http://www.PPEI.com/

  3. #3
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    The logs are on my other computer so i will post them up this evening.
    07.5 2500 Dodge Twin Turbos, Dual Pumps, Deleted, 100% over nozzles, Fletcher Bump Stick, and more goodies, Awaiting EFI Live Tuning

    05 2500 Chevy Duramax, EFI Live Tuned

    01 2500 Chevy Duramax, ZF6, EFI Live Tuned

  4. #4
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    Log files attached. #1 and #3 are normal and #2 is where the differences are. The pids available on all the logs change but you can watch the commanded fuel pressure, both balanced rates and uncompensated on all of them.
    Attached Files Attached Files
    07.5 2500 Dodge Twin Turbos, Dual Pumps, Deleted, 100% over nozzles, Fletcher Bump Stick, and more goodies, Awaiting EFI Live Tuning

    05 2500 Chevy Duramax, EFI Live Tuned

    01 2500 Chevy Duramax, ZF6, EFI Live Tuned

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