Hi, the problems started one after the other first the car broke down due to a dodgy MAF, the hotside to intercooler boost hose popped off and the EGR failed. I have replaced the EGR with new and the MAF with an after-market but not the car smokes noticeable at night time with occasional black smoke when it looses power this happens usually when cruising in 5th at between 12500 and 15000 revs, it also hunts every so often on idle and puffs a little smoke when it does. other than that it runs fine, starts from cold, mpg seems fine around 50 mpg down the motorway at 70. there is no mayo under the oil cap and the cooling system doesn't appear to be pressurised.
ohh and when the car looses power between 12500 and 15000 revs and puffs black it will sometimes throw up an EGR fault code
Any suggestions welcome before I rip off the turbo to inspect it or break down and cry to a mechanic.