alright i did my heads and had my qjet carb rebuilt my ecu fuse popped and i wasnt driving with the ecu for a while and barely reralized it when my smog check came i put a new fuse set timing to 0 and my ecu is hooked up and rebuilt carb and when i drive and it gets to 40 mph my car tends to hesitate and shakje i then push the gas more RPMs get to 2.5 and the car gets better but the problems still there i sent my ecu to autoecu.com and they said it was fine what can it be my carb was rebuilt in dec of 2012 and my sparkpklugs are new please help guys id really appreciate it ! i dont wanna junk my camaro cause this CA SMOG isnt helping either

Double check your firing order.
If that's ok, then you might have over adjusted a rocker arm or 2.

my firing order is good and I rebuilt my heads back in August of 2012 and that never happened so I dont think its a rocker arm, can it be my carb ? Or a sensor in my carb?