Can anyone give me some advise. I have a misfire when in 5th gear at between 1500 and 2000 rpm. I cleaned out the egr valve 4 months ago which stopped it smoking but it's started smoking again.

 

I think you may also wish to join the UK Jaguar Forums . This site has a large American Jaguar content .....Diesel Jags were never offered in USA. so they are of limited info & interest . However most general Jaguar info on here is first rate with some very well informed members from all over the world....