Thank you for your replies,
I am baffled by this car, 2005 Passat TDI, the first problem was the S hose directly out of the turbo, blew off, put it back on, blew off again?? Bought new hose. Around the same time emission work shop light! Bought a diagnostic code reader, 0299 turbo boost, in my feeble mind I thought too much boost?
I have oil oozing out of the air supply from the turbo at the connection at the bottom of the radiator, and out of the radiator, these are the lowest points, of air from turbo? At one time it would have power with black smoke, then the work shop light sends it into limp mode, if the car is turned off it resets to power for a power burst then limp mode? Any one have any ideas?