2018 V8 Hesitation on Acceleration?
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Thread: 2018 V8 Hesitation on Acceleration?

  1. #1
    FRESHMAN ROVER
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    2018 V8 Hesitation on Acceleration?

    Just picked up my V8 today, loved everything about it so far, but I noticed when I step on the accelerator from a stop, there is a slight (but noticeable enough to be annoying) hesitation before the car gets moving. Yes I did turn off the engine auto-stop feature. Came from a 2012 RR V8 that didn't have this issue.

    Anyone else notice that?
    -----------------------------
    2018 Yulong White RR V8

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  3. #2
    SOPHOMORE ROVER festertester's Avatar
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    Re: 2018 V8 Hesitation on Acceleration?

    not 2018 but it’s there for 2017 as well and if I recall correctly was a bit there for 2016 also. Perhaps it’s how throttle is designed to operate in L405 SC
    Last edited by RRToadHall; March 14th, 2018 at 11:54 AM.
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  4. #3
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    Re: 2018 V8 Hesitation on Acceleration?

    It's intentional. I'm guessing they figure people buying V8SC Range Rovers don't have any fine motor control so they build in a lot of dead zone to keep people from "jumping off the line". But it most likely has something to do with gaming EPA mileage certification, a lot of new SUVs I've driven have the same dead zone + slow ramp up of throttle. Ironically, it was likely done to reduce fuel consumption but the end result is the opposite because you have to quickly push through the dead zone to get going from a stop and end up accelerating harder than you intend to.

    Yeah, it's annoying but you learn to work around it. It doesn't do it as badly in dynamic mode as far as I remember.

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  6. #4
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    I agree that it probably has to do with epa. A lot of new suvs have the same issue. It really annoys me.

    I know on other brands there are third party devices that have settings to eliminate this. They are typically for performance cars, but I wonder if someone makes something similar for range rover.

  7. #5
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    Re: 2018 V8 Hesitation on Acceleration?

    If you think the throttle lag is bad in your RR never dare to try a Mercedes with the Twin Turbo V8 (550 or AMG63)
    Most modern drive by wire cars show some sort of lag when fully depressing the Throttle from a stand still position, I read somewhere its a feature programmed into the ECU. When you hit the throttle, the ECU interprets how fast and how far you push the pedal to determine if its going to launch in first or second gear and how hard its going to lock the torque converter, this "processing" translates into what you perceive as throttle lag. For some vehicles there are devices to improve acceleration, but I am not aware of any available for late model Range Rover.
    You can try driving in the S position or Dynamic program, it may improve things a bit or solve the problem completely.
    I only have 400 miles in my 2018 RR V8, and being old school I wait at least 1000 miles to "properly test" the car, so I cant tell at this point how bad the lag is, I also have a 2016 RRS Dynamic and it shows very little or no lag, as a matter of fact I call that car the neck snapping car, although the drivetrain is the same as my 2018 the throttle and transmission mapping is totally different.

  8. #6
    Moderator RRToadHall's Avatar
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    Re: 2018 V8 Hesitation on Acceleration?

    if it is really that bad simply get a throttle compensator and condense your throttle sweep.
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  9. #7
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    Re: 2018 V8 Hesitation on Acceleration?

    Quote Originally Posted by Carac View Post
    It's intentional. I'm guessing they figure people buying V8SC Range Rovers don't have any fine motor control so they build in a lot of dead zone to keep people from "jumping off the line". But it most likely has something to do with gaming EPA mileage certification, a lot of new SUVs I've driven have the same dead zone + slow ramp up of throttle. Ironically, it was likely done to reduce fuel consumption but the end result is the opposite because you have to quickly push through the dead zone to get going from a stop and end up accelerating harder than you intend to.
    Exactly, I feel like I have less control over the vehicle when I go from a stop or slow roll. I haven't tried to floor it since it has only 50 miles on the odometer. It's not terrible and hopefully I will get used to it but just a bit annoying.
    -----------------------------
    2018 Yulong White RR V8

  10. #8
    FRESHMAN ROVER
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    Re: 2018 V8 Hesitation on Acceleration?

    I noticed the same issue. Dynamic mode fixes the problem for me. Started using it off and on after 100 miles.
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  11. #9
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    Re: 2018 V8 Hesitation on Acceleration?

    I have this with my v6 hse...and ya it's pretty **** annoying. None of my 15/16 rovers did it either (those were v8 supercharged and SVR) I'd likely go aftermarket to fix that too.

  12. #10
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    Re: 2018 V8 Hesitation on Acceleration?

    Quote Originally Posted by RRToadHall View Post
    if it is really that bad simply get a throttle compensator and condense your throttle sweep.
    Is there one available to bypass the idle CTP sensors for the electronic throttle motor?
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  13. #11
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    Re: 2018 V8 Hesitation on Acceleration?

    I've experienced this 'dead spot' when you first press the accelerator on every V8SC L405 that I've owned (15,16,17,18. The 'S' mode got rid of most of the hesitation for me. I've found it's mostly gone in the Dynamic mode on the 18 and it's even less noticeable, if not gone completely, if you use the S mode and toss it in Dynamic.

  14. #12
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    Re: 2018 V8 Hesitation on Acceleration?

    I was just thinking about it on the way home. It feels like the dynamic mode is what the normal mode was for '17 and before. The comfort mode (that I guess we're all talking about) is like the car was sleepy.

  15. #13
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    Re: 2018 V8 Hesitation on Acceleration?

    My 2018 RR HSE has the problem. Only 2 RR's sold at my dealership last year have the problem, so it is not widespread. It is not designed into the engine. It is a defect. Factory knows about it but is not moving forward with a fix. Spent 45 minutes on the phone with Mahwah and they tell you "Engineering is working on it, but they need more data from the dealers." Suggest you call Mahwah and establish a Case to get the point across to them. Dealership service manager is frustrated that he cannot resolve the issue and the factory is not helping. Manager is convinced it is a software issue and not mechanical. He drove it 2 blocks with me in the passenger seat and said...."yep; you've got the hesitation problem." Hesitation occurs only at slow speeds, usually after a stop and especially after braking to make a slow speed turn. Annoying. And dangerous when trying to accelerate to get into traffic. Needs to be resolved. Sport mode and dynamic help but do not eliminate completely.

  16. #14
    FRESHMAN ROVER
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    Re: 2018 V8 Hesitation on Acceleration?

    yeah your not alone i have it bad in my 2019 rrs the delay is sometimes close to 2 seconds. it is so bad that i was almost hit when exiting a parking lot trying to enter oncoming traffic with blocked view. every time i go to make a turn from a stop sign or around town i press the peddle and absolutely nothing happens for 1-2 secs and then wham it kicks in. I cant drive this like that. i only have about 120 miles on mine as i have not been driving all that much and intend on bringing it in but i would like to get a little more time in my new rr before having it sit in the shop for a week.
    2019 Range Rover Sport HSE Dynamic

  17. #15
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    Re: 2018 V8 Hesitation on Acceleration?

    Just did a full scan on my car and on board diagnostics came up with several faults with VVT also diagnostics came up with several intermittent codes on can bus lines. so one of the modules or components are faulty of has a bad connection, causing system wide problems. I bet this is the reason for the delay in throttle response.

    I made an appointment for two weeks, just brought my f pace in for multiple problems it too came up with can bus errors and crankcase sensor shorted to ground.
    2019 Range Rover Sport HSE Dynamic

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