Gents/Ladies

Ran my car through VCDS no faults, but whilst driving the car hard through the gears, i get NO smoke, just does not seem as smooth as it was (feels like misfire), but if i casually drive the car and try to accelerate ....sloooow and then away she goes then white smoke out the back. But disappears as revs pick up? Confused

Have VCDS if anyone ever needs use of one :-)