I have a 1991 chevy camaro that i just purchased is is a 305 tpi. car sat for three years. it had a bad fuel pump. replaced fuel pump new distributor, plugs wires wouldnt hardly run and threw a map sensor code. replaced map sensor. runs better but idles fine go to take off it wont hardley pull out of its tracks. i cut the cat off didnt change anything. when i go to pull off and get started moving its mis firing really bad all plug wires are in the rite place and timing was set with a gun. im new to tune port any suggestions at all if it was a carb i wouldnt have this problem. any help is very much appreciated