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Thread: Acceleration Hesitation Cause

  1. #11
    Durango Expert jfire72's Avatar
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    LOL @ the MDS!! I also have a 392 Daytona, there is no issue with HP in that regard. The only difference is the sound, but it picks up quick as hell when coming out of MDS, no lag, no hesitation.

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  2. #12
    Senior Member MikeD1's Avatar
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    Quote Originally Posted by MNiceGuy View Post
    There was also some mention of MDS because the Service Manager was saying something about how the MDS deactivation on a Hellcat is especially noticeable because of all the horsepower.
    I find the whole ECO setting on the Hellcat hilarious, who buys a 700+ HP car then wants to kill the power to save a little gas ! If you are worried about the MPG, then save a ton of $$$ and just buy a Challenger STX - LOL.
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  3. #13
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    Quote Originally Posted by MikeD1 View Post
    I find the whole ECO setting on the Hellcat hilarious, who buys a 700+ HP car then wants to kill the power to save a little gas ! If you are worried about the MPG, then save a ton of $$$ and just buy a Challenger STX - LOL.
    That is actually pretty funny. I want a car with horsepower approaching double that of the original Viper; able to convert $600 worth of rubber into burning liquid on-demand. I only wish I could get a few extra MPG out of it though. Every gallon counts!

    Someone might have to correct me here but I don't think the 6.2L and certain forms of the 6.4L (SRT) even have MDS do they?

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  5. #14
    Durango Expert jfire72's Avatar
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    Quote Originally Posted by MNiceGuy View Post

    Someone might have to correct me here but I don't think the 6.2L and certain forms of the 6.4L (SRT) even have MDS do they?
    The 392's (6.4L) have MDS. The Hellcats (6.2L) do not have MDS because of the supercharger.

    Again, my 392 and MDS doesn't really help or do much, nor do I care about it LOL!

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    I've noticed this on my '18 RT as well and I really believe this is a torque management feature in the ECU. It's likely tuned in conjunction with the traction control system since I don't believe even the RWD version has an actual limited slip differential (haven't confirmed though) so it would make sense to try limiting the amount of power that gets put to the wheels at lower RPMS.
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  7. #16
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    There was also some mention of MDS because the Service Manager was saying something about how the MDS deactivation on a Hellcat is especially noticeable because of all the horsepower. What gets me is the whole bloated explanation of the traction control, reduced engine power, etc. from the dealership.

  8. #17
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    Quote Originally Posted by Shrovetide View Post
    There was also some mention of MDS because the Service Manager was saying something about how the MDS deactivation on a Hellcat is especially noticeable because of all the horsepower. What gets me is the whole bloated explanation of the traction control, reduced engine power, etc. from the dealership.
    Hellcat doesn’t have MDS.


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  9. #18
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    I came across this thread because I have a 2018 GT with the same problem. From a stop, about 1/3 - 1/2 throttle you notice a hesitation while accelerating. We took it to a good dealership I've used in the past and they confirmed it is a sensor malfunctioning that causes the transmission to not work properly. They ordered the sensor and are replacing it for free (under warranty). I wouldn't be surprised if this turns into a recall. Anyone who is experiencing this and the dealership tells them there's no problems because the check engine light isn't even on needs to tell the dealership to do their jobs and check the sensors.

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    Quote Originally Posted by MNiceGuy View Post
    Thank you jfire! That is exactly what I'm talking about. It has subtle hesitation and then at the upper ranges it seems to wake up. That thread was never resolved but it's nice to know I'm not crazy. Well, not completely crazy.
    I see its an old thread, but IMO what you are feeling in the upper ranges is the long runner/short runner change in the intake. I do not know if it relates to your hesitation issue or not.
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  11. #20
    Durango Expert jfire72's Avatar
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    Quote Originally Posted by XCELLR8 View Post
    I see its an old thread, but IMO what you are feeling in the upper ranges is the long runner/short runner change in the intake. I do not know if it relates to your hesitation issue or not.
    Thanks for reminding me about this thread, I needed to do an update here anyway!

    I'm not really sure what was going on with it. I had mine in several times for another issue, so I brought up the hesitation problem for them to diagnose as well. They thought it would be fixed with some of the things they were doing to it, but in the end it still did it. This is my 2nd current gen Durango, and the 1st albeit a V6 didn't do it. I am now on my 2nd current gen Charger as well, again 1st was a V6. My Charger has never done it, maybe it's a 5.7L thing, as I've got a 6.4L in it, who knows.

    What did fix the issue for me, and call it crazy, but I installed a Pedal Commander a couple of months ago, and the problem is gone. I still had it with the Eco and Normal settings on the PC, but putting it into the Sport setting seems to have fixed it. I now have it in Sport 4, there are 4 -, and 4 + settings in each mode, just FYI if some of you aren't familiar with the PC. Anyway, it woke it up and it feels like a V8, and responds a lot like my Charger, making it more fun to drive. It's really a huge improvement to the spongy/slow response it had before. Best of all the hesitation seems to be fixed, or at least masked by the throttle response from the PC. Like I said call it crazy LOL!

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