[carsonmx114]

gorfllub and i can relate to your problem. your problem sounds a little different, you didn't say if your car did this before your last service or not. if this just started after the service then you should look for a loose hose that would cause a vacuum leak between the airflow meter and the turbo, or a presure leak after the turbo. also you should invest in a good aftermarket boost gauge so you will know for sure what your turbo is doing. since the car doesn't do this after it's warm (warm engines need less fuel) i would guess it's lean so be very carefull, a lean mixture can be death to a turbo engine.