XK / XKR ( X150 ) 2006 - 2014

07 XK Multiple Issues

 
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Old 06-23-2019, 10:21 AM
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Default 07 XK Multiple Issues

Gonna' list all of my problems in one thread...3rd brake light out...Trunk button inoperable...Steering wheel shudders when turning going slow under 3 MPH...The "Lurch"...Door side panels becoming unglued... Driver seat belt goes beyond seat Loop and gets stuck behind it...Any advice appreciated!
 

Last edited by viper1996; 06-23-2019 at 11:11 AM.
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Old 06-23-2019, 02:19 PM
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Old 06-23-2019, 04:31 PM
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When driving home from Maryland after my purchase I noticed about an hour and a half into the ride home it started to do the 2 to 1 Lurch when coming to a stop. Did hours of Google research on the lurch. Everything from changing transmission fluid to reflashing both the ECM and the TCM. What seems to have worked for me so far is coming to a complete stop when braking. Mine would be fine driving for the first half hour or so but then would lurch every once in awhile when slowing to a stop but then accelerate. I don't know for sure but I think the Adaptive transmission gets confused when you start to come to a stop and then accelerate?? Regardless, I haven't had the lurch since breaking more firmly and coming to a complete stop. It's been over a thousand miles and you don't need to drive gingerly, just come to a complete stop for a while when braking and the car seems to learn to downshift smoothly.
 
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Old 06-23-2019, 07:38 PM
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Shudder is commonly associated with warped front rotors .

Is this happening when applying the brakes
 
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Old 06-23-2019, 08:16 PM
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Originally Posted by Kongo1 View Post
When driving home from Maryland after my purchase I noticed about an hour and a half into the ride home it started to do the 2 to 1 Lurch when coming to a stop. Did hours of Google research on the lurch. Everything from changing transmission fluid to reflashing both the ECM and the TCM. What seems to have worked for me so far is coming to a complete stop when braking. Mine would be fine driving for the first half hour or so but then would lurch every once in awhile when slowing to a stop but then accelerate. I don't know for sure but I think the Adaptive transmission gets confused when you start to come to a stop and then accelerate?? Regardless, I haven't had the lurch since breaking more firmly and coming to a complete stop. It's been over a thousand miles and you don't need to drive gingerly, just come to a complete stop for a while when braking and the car seems to learn to downshift smoothly.
You might want to try a hard reset and let the car learn your driving habits.
 
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Old 06-23-2019, 10:04 PM
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Originally Posted by steve_k_xk View Post
Shudder is commonly associated with warped front rotors .

Is this happening when applying the brakes
Rotors don't warp; they accumulate brake pad residue from slow stops that builds high spots that cause the brake pedal to pulsate or shudder. Before having the rotors resurfaced, try the Italian brake job: on a clear highway, accelerate to 70 mph and then hit the brakes hard and slow down to around 30mph. Accelerate and repeat the process 5 or 6 times or more. That might get the rotors hot enough for the calipers and pads to remove the accumulated high spots and eliminate the shudder.
 
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Old 06-23-2019, 10:10 PM
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Stuart I can send you photos of warped rotors from direct impact on the wheel and also when the wheel nuts are put on too tight.

What a ridicilous comment to make
 
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Old 06-24-2019, 02:32 AM
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Originally Posted by steve_k_xk View Post
and also when the wheel nuts are put on too tight.
I have seen people claim that before but I still don't understand how over tightening wheel nuts could warp a brake disc. The disc is clamped between the wheel and the hub and the braking surface is some distance away from the bit that is clamped so I wouldn't have though it would make any difference how tight the nuts are. I could understand if the disc was put back on with corrosion behind it so that it didn't sit flush to the hub though.

I thought I was due a new set of front discs on my '10 XKR after some late night standing quarter timings on a quiet back street caused shuddering on braking but 4 months later a track day seems to have sorted the issue out so I assume my issue was brake pad residue from being stationary for too long with hot discs and the brakes applied.
 
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Old 06-24-2019, 03:46 AM
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Originally Posted by steve_k_xk View Post
Stuart I can send you photos of warped rotors from direct impact on the wheel and also when the wheel nuts are put on too tight.

What a ridicilous comment to make
I forgive you for believing that myth. Ignorance is bliss. https://www.brakeandfrontend.com/warped-rotors-myth/

Unequal torque, perhaps.
 

Last edited by Stuart S; 06-24-2019 at 03:48 AM.
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Old 06-24-2019, 04:12 AM
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Just to keep you happy Stuart I will substitute the word warped from now on .. perhaps your front rotors are 'deformed' due to over tightening or the incorrect tightening sequence was used.

Didnt know their were so many cynics on this forum
 

Last edited by steve_k_xk; 06-24-2019 at 04:16 AM.
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Old 06-24-2019, 05:42 AM
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I'm not cynical, just realistic. My rotors aren't warped, but my sense of humor is. Accept that you were mistaken and move on. You learn something new every day.
 
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Old 06-24-2019, 06:43 AM
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I did clear the transmission adaptives to no avail...
 
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Old 06-24-2019, 06:46 AM
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The shudder is in the steering wheel at very low speed not a brake rotor problem...
 
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Old 06-24-2019, 07:01 AM
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Originally Posted by viper1996 View Post
The shudder is in the steering wheel at very low speed not a brake rotor problem...
Hearing this I wouldn't consider it a transmission issue. It would be somewhere in the tire , wheel , tie rod ends or steering rack. Also might have someone check the run out of the front rotors just to make sure there isn't a problem there. This can be done on the car with the wheels removed. Also consider a wheel alignment and the steering components can be check at that time. Also a check on the ABS system should be considered.
 
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Old 06-24-2019, 07:11 AM
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Viper, if you lightly hold the brake and lightly hold the gas; does the 3MPH steering shutter go away?
 
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Old 06-24-2019, 09:02 AM
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I think the shudder is in the power steering system.
 
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Old 06-24-2019, 08:56 PM
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Originally Posted by Stuart S View Post
I'm not cynical, just realistic. My rotors aren't warped, but my sense of humor is. Accept that you were mistaken and move on. You learn something new every day.

Why don't you look at the definition of warped Stuart .

Stuart have you ever turned a single spanner in your life I very much doubt it
 
Attached Thumbnails 07 XK Multiple Issues-screenshot_20190625-115550-139.png  

Last edited by steve_k_xk; 06-24-2019 at 09:01 PM.
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Old 06-24-2019, 09:13 PM
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Originally Posted by 110reef View Post
I think the shudder is in the power steering system.
Exactly. But I find it hard to believe when the car came out as new it would have this kind of problem
 
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Old 06-24-2019, 10:46 PM
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OK, how about we all agree that "Warped" could be a condition and not a Causality. . ? ?
 
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Old 06-25-2019, 11:21 AM
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Originally Posted by 110reef View Post
I think the shudder is in the power steering system.
I want to rule out RPM drop of the engine causing a weaker output of the power steering pump.

The light throttle + light brakes keeps the RPM from dropping when demand is placed on the power steering pump.
 
 
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