Ok guys so here is what we are working with.
2003 Chevy Cavalier 2.2 ecotec 46k miles auto

Symptoms:
Won't rev up at wide open throttle
No power won't acellerate when in gear
Smokes heavy and stutters when accerlerator floored
Pressurized air can be felt coming out of the throttle body opening.

Already eliminated:
TPS is working properly
MAP sensor is working properly
Cat was removed but no change
Air flow in and out is good
Changed oil and plugs just because
Vacuum gauge shows what seems to be good vacuum shows 0 vacuum at WOT
Fuel pressure is good 55psi at idle

I'm having trouble trying to figure out why it is doing this. Maybe it has jumped timing or something computer controlled isn't working properly. I am stumped guys I need help.
Thanks