My car smokes when I am totally off the gas and then give it gas again. It doesn't smoke at all under normally driving, under boost, or decelerating from any speed? The smoke is white if this helps. It also smokes a little bit at idle. Any help please?

 

I am haveing the exact same problem. I just put my new turbo on last week and it's been doing it ever since. I am sure it's the turbo. I just redid some fitting under my car and I see the turbo is leaking oil out between the turbine and the center section. I bet some of that is getting into my exhaust and maybee the compressor too!