Smokes at first start up

it has been smoking since having a decarban put through and it has been to main Land Rovers they put a new throttle body and cleaned butterfly sticking. also had compression test number one cylinder 260psi 18 bar. Two cylinder 240 psi 18bar three cylinder 200 psi 14 bar. Four cylinder 200 psi 14 bar renewed number 3 injector. it was okay for a couple of days now bit of a rattle and smokes at first start up when warm runs brill. I am running out of ideas on what it could be. any advice? Clint