Preventing automatic downshifts
#1
Preventing automatic downshifts
Greetings,
I'm trying to get a clean Dyno run, but it seems that no matter what mode I select, when the operator floors the car (2000-3000RPM), it drops a gear every time.
The manual says there is a mode that prevents kick-down, but regardless it still does so.
Anyone heard of a TSB or such to address this?
Also you can clearly feel the switch at the bottom of the accelerator that from what I feel, is part of the lick-down function... Can this be physically over-ridden?
Thanks
Vince
I'm trying to get a clean Dyno run, but it seems that no matter what mode I select, when the operator floors the car (2000-3000RPM), it drops a gear every time.
The manual says there is a mode that prevents kick-down, but regardless it still does so.
Anyone heard of a TSB or such to address this?
Also you can clearly feel the switch at the bottom of the accelerator that from what I feel, is part of the lick-down function... Can this be physically over-ridden?
Thanks
Vince
#2
#3
The manual says that you:
Put the Gear Selector all the way to the right in S
Select the gear with paddle shifter
It says the car will stay in manual mode and not switch back. I have not tried redlining it with these parameters, but I have rev'd close to the limit without it auto changing.
My car is a '12 XK, not sure if this correlates to your year and if your S mode operates the same.
Put the Gear Selector all the way to the right in S
Select the gear with paddle shifter
It says the car will stay in manual mode and not switch back. I have not tried redlining it with these parameters, but I have rev'd close to the limit without it auto changing.
My car is a '12 XK, not sure if this correlates to your year and if your S mode operates the same.
The following users liked this post:
CleverName (06-21-2016)
#6
F20 is labeled DSC pump and F22 is DSC Valves.
I need to pop the service manual and look for that detent at the bottom of the accelerator peddle. Seems kickdown happens as soon as you hit it.
V
#7
Trending Topics
#8
Did a 5.5 hour dyno session today, pulled fuse 20 from the engine compartment box to disable the DSC/ABS pump. Was able to go all the way to 6500 RPM in 4th gear at 130 MPH with no issues or kickdown though ABS and DSC had some issues after the fuse was replaced. Had to drive around a bit to clear the codes. For some reason DSC seems a lot more sensitive now.
#9
There is a soft stop in the pedal that brings you to what I believe is full throttle. Past that point, it takes a lot more force, and you depress a "kick down".
I'd imagine that you are still at full throttle before that kick down switch on the soft stop. I don't know for sure though.
I'd imagine that you are still at full throttle before that kick down switch on the soft stop. I don't know for sure though.
Last edited by Tervuren; 07-02-2016 at 09:10 PM.
Thread
Thread Starter
Forum
Replies
Last Post
FS[Western US]: Parting out 1997 XK8 convertible
BobRoy
PRIVATE For Sale / Trade or Buy Classifieds
49
09-18-2016 10:48 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)