Thanks Rumcaj..for ur advice,ill get the codes looked at and the cat checked as well. the patrol was blowing black smoke well before the tuner done any work on it, from day one when i brought it.
Its at a Nissan dealer at the moment getting the exhaust manifold done again(second time in 31/2 yrs the trucks only done 103000km).
They also said that the turbo has a slight oil leek as well, do u have any clue what might cause that to happen?
Look forward to any other feedback u can give me, very much appreciated.Cheers Eric