This occurs randomly and after car is warm. Car seems to run fine. Then, at different speeds and in different gears, the motor acts like it shuts off though it is still barely running. If I clutch in and rev the heck out of it, it won't rev past 4-5k. If I leave it in gear (or put it back in gear after reving the heck out of it) the only thing that keeps the motor from stalling completely is the transmission (i.e. momentum of car). Usually while still rolling and in gear it will suddenly come back to life and run as if nothing happened. I've recently swapped computers and ignition coils so I know it isn't those two things. Also, when it does completely die, its only three or four cranks before the battery dies. When the car is running properly, the battery seems strong. Anyone have any idea what this could be? Please help, I'm really frustrated!!

Car: 1993 Civic DX hatch
Engine: OBD1 JDM B18C