1987 Chevy Corsica Won't Start

Engine Performance problem
1987 Chevy Corsica 4 cyl Front Wheel Drive Automatic

Earlier I was driving my 1987 Chevy Corsica when the engine started chugging I managed to get the car home. The next day it ran and was chuggin as we put it in the garage. We checked the plugs and wires and had spark. The compression was good. We thought it to be a fuel issue so we replaced the Fuel pump and the Sending unit. After getting the car back together it wouldn't start. Any Ideas?