Chris I am a owner of a 93 Lumina, and A Auto tech. If you have SPARK, AND HAVE GOOD FUEL PSI AND HAVE PULSE REFERENCE at the INJECTORS Check fuel filter. it is located on the drivers side rear one side is a clip and the other is a 5/8 and a 11/16 6point line nut break them off and blow threw the out side. if you cannot get air threw it then it is blocked. Now if you have good flow threw the fuel you have to check something computer driven double check to see if your spark is uniform and not erratic. A cam sensor and crank would cut out one or both spark and fuel at the same time I have a 93 specific chevy lumina book hear i can ref for you. email me at kamakazih69@msn, com that way i can help you more