Ok here goes: I have a 1994 Camaro B4C, LT1, 4L60E combo.
First off, mods done to the car (may have something to do with it) :
K&N air filter, 1LE induction elbow, gutted catalytic converter, 3" american thunder flowmaster exhaust, 3.42 gears, Hypertec Power Programmed, 160 degree thermostat, and bosch platinum +4 plugs.
Ok now the problem, towards the end of the fall i noticed the car was running VERY rough near the point of stalling at stoplights, hesitating at lower rpm's and then when i reached the higher rpm range the car just revved up and seemed to drop off the power curve completely, like flooring it and then throwing the car into neutral at 3500 rpm.
The car puffs mass amounts of black smoke when floored (im guessing the o2 sensors are shot) could this be the whole problem? Any suggestions would be greatly appreciated so i can try to get this thing up and running right by the time spring rolls around. If there are any more questions or comments you can email me at Camaroman1983@yahoo.com

Thanks,
Matt

 

Definitly replace the o2 sensers,that will probably solve it.And welcome to the board.