2003 jaguar xkr 4.3l v8 with blue smoke on take off. What do you think it is wrong with it ??

 

Worn piston rings. Blue exhaust = burning oil. How many miles on your engine? How often do you check your oil level?

You're in the wrong forum. This is the 2007-up X150 Forum. You should ask in the previous model X100 forum. Hopefully, the Moderator will move this thread.

 

Stuart is correct. To further the information, blue smoke on start-up is worn valve guides/seals.