running like crap when cold.

Hi guys i was just wondering if someone could help me out. ive got a 96 cavalier 2.2 auto. When it is cold it runs terrible. It takes a couple tries to start it cold. It will pop off and die usually twice then start and idle good. To drive it cold you gotta feather the gas lightly to get it to move. once warmed up to operating temp it runs good. but even when it is warmed up if you go past half throttle it boggs down then it will take off. Ive changed the plugs, fuel filter, iac, tps, and front o2 sensor. There is a check engine light on and i took it to autozone but for some reason the scanner wouldnt link up? I reset the computer and it ran even crappier until the check engine light came back on. Any help is deeply appreciated. thanks and sorry for the long post