https://photos.app.goo.gl/PgDLJwH1tH3Q6JMSA

This is the 3.2 sport without traction control and without cruise control and I'm not seeing a potentiometer that is mention in the other threads. Is this normal operation and if not what should I do? My mechanic is hesitant so tamper with the cable saying it could cause issues with idling. Keep in mind it's a regular mechanic not a Jaguar specialist. Is there maybe a TSB or something in the service manuals for adjusting the cable?

 

Is this really such a difficult question?

 

Its not but its start of the summer so probably everyone feels a bit lazy atm

Anyway, first of all you need to get an OBD scanner and see whats the current TPS range when viewing live data. TPS is the little potentiometer you're referring to in your post. Its mounted to the bottom of the throttle body and messing up with it without knowing what you're doing is sure going to cause an idle problems.
Depending on your OBD scanner, TPS range will be shown in either % or V.
If its in %, it will be ~11.37%, if in V, it should be ~0.61V with the throttle closed and foot off the gas pedal. You don't have to have the car turned on, just switch ignition key to position 2. It is crucial at this point to record that base TPS voltage, after you start messing with throttle cable adjustment this base value has to stay the same, any difference to it over 0.02V and you'll end up with high idle and you'll either need to readjust it back or do a TPS adaptation at the dealers.
Now that you established your base TPS value, you can check the MAX TPS voltage. With the key in position 2 and viewing live data press your foot at the gas pedal all the way down and record your max TPS % or voltage. It should be as close to 100% or 5V as possible. If its anything over 4.85V or lets say 95% you dont need to adjust anything. If its something like 4.2V or 75% then you definitely need to adjust your throttle cable. Tighten it up, by undoing the little nut and pulling on the cable. Get as close as you can to 100% or 5V and you'll be good to go. If you wont be able to achieve good results, you might have to replace cable or go further with adjusting TPS itself too. Despite how its attached to the throttle body, there is enough play in the bolts securing TPS to change its voltage by maybe 0.08V. With the throttle closed you want to make sure to have 0.002" gap in the throttle butterfly itself.
Tricky bit is that adjusting one thing can change another so its a matter of checking all three at the same time but generally you want the throttle gap at 0.002" when closed, base TPS idle at whatever its set right now, hopefully around 0.61-0.63V or ~11.37% and as close to 5V or 100% with the foot fully down.
Hope this makes sense!

 

Is my cable good? There is a loose piece of plastic/rubber on the cable which I'm not sure if it was ever functional or it's just to keep the cable clean?

And there is a random nut looking thing on the cable that's not doing anything.

Should I buy a new cable?

 

I just turned the kickdown switch clockwise to screw it in more and I think I got WOT. Hope I didn't mess anything up. I don't have time right now for a test drive and it's raining. I'll take it for a test drive tomorrow.

https://photos.app.goo.gl/PykiUDakrjH6UFZ6A