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Thread: 05 slow 1 second delay from on power to 0 fuel?

  1. #1
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    Sep 2017
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    05 slow 1 second delay from on power to 0 fuel?

    This is one thing that has bugged me about this truck since I bought it. If I lift off the throttle and push in the clutch like I normally would with everything else I own the RPM jumps up a little before dropping on this truck because it's slow to transition to off fuel. Looking at logs I get a full second from the time my foot is off the pedal to the time the transition to 0 fueling. I'd like to get rid of this delay completely, but I figured I'd ask if someone knew exactly where to point me first before I kill a day figuring it out. I've been digging through everything and for some reason this is the one thing I cannot find in there I assume it's in the governors somewhere.

    I'd gotten used to the way I had my chevy diesel. The fueling adjustments happened as quickly as you could move your right foot. No torque management, no smoothing, just really good response.

  2. #2
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    Hello, should be under diesel fueling, main injection, no throttle fueling. there was a video on you tube where the guy explained these parameters . Hope this helps

  3. #3
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    I found those and killed them the same day my cable arrived in the mail. Those maps are the cause of the hanging issue at high rpm where it sits there for a couple seconds before starting to drop in rpm. I'm fixing one thing at a time before giving it more power. That problem was #1 on the list of annoying things I wanted to fix haha.

    I should've thought about a better way to explain it. What I'm looking for specifically is the change rate limiter that is there to cushion the on throttle to deceleration transition. It's there to reduce some abuse on the drivetrain. It makes for a "nicer" vehicle to drive. Also smooths out the transition when you switch cruise control off and your foot isn't on the throttle. I just don't know why dodge decided to go with such an agonizingly slow transition.
    I know it's in Diesel Fueling, Governors, but it's a process of narrowing it down at this point. It's not Deceleration limit, Decriment fuel quantity adjustment, nor Idle transition. It has to be in the droop somewhere, but some of it seems repetitive and maybe overlap each other like some of the other limiters. It takes time making small adjustments to one thing at a time and logging to see if there's a change in the de-fueling rate.

  4. #4
    My bet would be its controlled by PID. Change the gain setting, that effects how quickly it adds or subtracts fuel.

    This is just a guess, I have never messed with it never bothered me enough.

  5. #5
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    Feb 2019
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    Skstibi, did you ever figure this out? I'm getting throttle hang and would like to tone it down some.

    Buck

  6. #6
    Advanced Tuner
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    Jan 2018
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    Rail pressure PID tuning will help