I have my lovely XJ6 2.7TDVI sport .. Have Had some on going problems regarding a misfire and occasionally smoke comes out of one side of the exhaust. I have had the inlet manifolds changed. And now it is running better but still after a long drive and then when sitting in traffic it starts blowing smoke out of one side of the exhaust. I have been told that it could be an injector. Has anyone had this problem and is there anything else it could be.  Any help would be very much appreciated. as i have had the over a year now and have never driven her without this fault....  

hi

what color is the smoke, blue smoke means burning oil, if its smoke a bit, its most probably turbocharger seals, they smoke at idle when seals are starting to fail

black smoke usually means burning fuel, possible injector

white smoke, can be water or just condensation on cold mornings

does it use any engine oil or water

you can also get smoke from passenger side of engine bay, wheel arch are, this normal below 5 deg C, aux diesel heater webasto runs at that temp to assist heater warm up times.

cheers

Joe

hi thanks for the reply .it's black defiantly a diesel smell and today when i took it out after driving it for about 20 miles when i stopped it was idling very rough. drove it home. Another 6 miles and seemed ok when i pulled up scratching my head again now...

Check the oil level when the engine has cooled down.

Added to what Joe has said, it is possible that the DPF was regenerating and has used some of the engine oil to assist.  Some engine il could have got into the sump.

Peter.

thanks for that. I have checked the oil and it seems to have risen up a bit .. 

Hi

if oil is rising, thats bad, usually a leaky injector, which means diesel is getting into the engine oil

Id get the injectors checked and oil changed, diesel not a very good lubricant and its the biggest killer of the 2.7 engines

cheers

Joe

yes thanks for that i have have the diesel do it before and was told when the dpf regenerates it can put any unused diesel into the sump. So i changed the oil and oil filter .. but i have to say it didn't take long to start topping up again .i have been looking at injectors but I'm not sure what numbers have to be the same. on mine they are , 5U3Q-9K546-AA.  ADQTL FJ17  30811 picture attached of my one . Any help would be appreciated thanks again..