It runs down the road fine, and if you let off the gas to stop or slow down, when you go to move again it doesn't do anything so I floor it and a couple seconds later it just takes off and blows a ton of black smoke (it is chipped but never blew smoke before) any experts with answers? Thanks

This link should help:

https://www.askmehelpdesk.com/cars-t...ml#post1921427

The turbo is not working correctly if at all. The VGT turbo may be stuck. The solenoid bad or disconnected or like mine a broken wire to the solenoid making the turbo not work at all. Boy did it blow smoke with the tune (superships) in but not in stock tune just ran like a slug. Apparently the Turbo is notorious for crapping out.