Alan Matthews

Hi there, Thanks for the response. My car does not lose power altogether it happens intermittently that as I set off the car will move, the revs build up but I am only just rolling. However, as I am rolling the speed increases and catches up. This can go on for a while and then all of a sudden it reverts to driving absolutely normally and can stay that way for many days and then it happens again. After having a discussion with my garage, (who is a Jag specialist) I told him that I thought it was a problem with the communication between the potentiometers at the accelerator and the throttle body, He initially was reluctant to accept this, but, after discussing it with the dealer I got the car from. he had another customer with the same problem some time ago and replacing the throttle body body solved it. So, the dealer has now arranged with the garage to replace the throttle body on my car (no charge) which is being done Wednesday and will hopefully resolve the problem. Will post again after I have driven for a while. Cheers.

Hi Joe, My car is Keyless Entry and automatic so this wont work but thanks for the reply anyway Alan

Just had a gearbox service at my local garage who are Jag specialists and deal with no other cars and are attached to the dealer I got the car from. I ensured they used all the correct parts and most specifically the correct oil. I hoped this would cure an intermittent problem I had been having with acceleration, which is: on depressing the accelerator all that happened was the revs built up slowly, felt it was not changing gear, and slowly the speed built up. This happened even when I floored the accelerator. The next time I got in to drive the car I depressed the accelerator to get going then all of a sudden it shot off like a bat out of hell. This happens whether in Drive or Sport and there is no Kick Down either. Now unfortunately, it is happening all the time. Being a "fly by wire" system I have a feeling the the problem may be the the communication between the potentiometers at the accelerator and the throttle body which need to be reset. Of course when I mentioned this to the technician he basically just smiled and dismissed me. Any thoughts or help would be greatly appreciated.

Thanks guys for all the info, I will now have a chat with the garage to make sure he follows all the necessary steps and uses all the right parts in particular the oil. Cheers Alan

I am advised by my garage that my 2010 Prem Lux XF is due a Gearbox Service. Not asked for a quote yet but am curious if any body knows what is entailed in this and what the rough cost may be. This is not a main dealer but a garage attached to the place I bought it from but independent of them. Thanks.

Good idea, never thought about this. Did it yesterday and worked just fine, great tip, thanks a lot.

I have just got a 2011 Jaguar XF Prem Lux and it s a beautiful car. I am getting on with it ok but am struggling to find out how I can "name" my phone rather than just iphone. There were a load on when I got it which I have deleted. Any ideas, thanks