I have own this car from the day I ordered it from the dealership It has worked very well untill recently. After the engine has warmed up, When I accelurate pedle to metel, the car stutters and there is no power, to the point of stalling out. The engine is blowing black smoke only when this is happening. When I take my foot off of the pedle the turbo de-accel's instantly the engine will limp along slowly. This looks like a sensor issue, but which one, and I don't think it is the turbo!! or is it Comments most welcome !!