Smokes when accelerate after going down a hill on 2004 Chevrolet Cavalier

I have an 04 Chevy cavalier 2.2 Eco tech 5 speed. When I go down a hill I push the accelerator it smokes. Also recently when I come to a stop the car stalls. It starts right back up though.

2 answers 1 comment
what color is the smoke coming out
Blue-ish , light grey
seek diag from your mech to be sure