My 1994 z24 has a problem staying started.

My 1994 z24 has a problem staying started. When I drive it the RPM's will flutter and the car will die if I don't let off the gas, but when i stop the car it will usually die. If i press on the gas to much the car will die too. I replaced the Radiator due to a crack and the water pump due to a leak. My friend said it may be a computer or an injector clog. I you know anything about it please help. I up for any suggestions.