My wife's XK has developed a fault on starting! The car starts ok then about 5-10 seconds later it revs upto between 3-5 thousand RPM stays there for 10 to 20 seconds then settles to normal. Anyone have any ideas before I take it in to Jaguar. The Engine is the 4.2 by the way.

 

Sounds dangerous, I would have it towed. Can you capture this on video?

 

If it doesn't do it after start up it will be safe to drive. If it does it every start-up the dealer will be able to reproduce it, otherwise taking a video to show them is a very good idea.

 

Does it rev even if you put it in gear?

 

We have not put it in gear as we are worried about doing that at so high revs. Funny but it only does it on the first start up of the day! I will take a video of it, I think we may have a sensor on the cold start side on its way out.

 

I bet it'll be a simple fix.

 

Maybe the big cat is just stretching her legs?

 

Spoke to Jag they said its prob the throttle position sensor or an airflow problem. My air filter does need changing, the pollen in NC was really bad this year it was like snow but have been putting it off so I could do it myself but it's not easy on the XK and have not had the couple of hours to do it. Will get the filter changed by jag as is only $20 more than me doing it and the sensor will be under warranty. Will let you know exactly what they find for future ref. thanks for the reply's

 

So Started XK this morning and it shut itself down and engine light came on! It's now in Jaguar service and I am driving a Camry. Let's see what happens.

 

So to update for future ref, XK is back the problems, needed new software for the throttle and control systems as mine had been corrupted some how ECU was apparently ok. The engine warning light needed a new fuse box as mine had shorted out. While jag had the XK I got them to flush the brake fluid and they changed the wiper blades. My part of the bill $500 so not too bad I know the fuse box was $1144 I saw that on the bill I have a $300 excess on my warranty. The car drives a lot better and accelerates more smoothly and is def faster to 60 so happy bunny all round. Note to poss new owners get a warranty and if buying privately reduce price accordingly as you need one as this one incident would of been $1500 plus.
If you can't pay you can't play! Never a truer word spoken!

 

Great that everything was fixed. I agree on warranty - also depends on personal financial situation of course.

 

Yep personal finances a big part. I can afford to repair the XK but it's great if someone else pays for you. My warranty cost me $1900 for a 72 month upto 100.000 mile bumper to bumper with as stated $300 excess with a roof control switch that was fixed under warranty too even with paying out $600 in excess I have returned what I paid for the warranty and still have 70 months left! Let's hope that I have trouble free miles from now on, but if not lets hope that the warranty company keeps its end up, so far they have been great.

 

What warranty company is this, pray tell?

 

Bought our XK from carmax and purchased the warranty then, funny enough but my local Jaguar dealer uses the same warranty company for out of manufacturer warranty sales at Double the price.

 

Hmmm... I'm wondering if I should get a warranty when I buy my XK. Just as a way to "insure" any incidental repair costs that may happen. However, I just looked up a few quotes online and they are something like $8000 for 60 months. How can that be?!

 

Wow that's a lot of money check out carmax there warranty is killer but you may pay more for the car.