1990 E-150 Won't start????

I don't understand it i was driving down the road last week and my 1990 e-150 just shut off and quit running it will turn over but will not start. It has a 300 inline 6 with automatic transmission. I have changed the spark module and the rotor, i now have spark all the way to the plugs by tracing them out and all plugs are sparking, i have fuel to the release valve on the injector lines but i still can not get anything,,,,,,any suggestions as to where to go from here wuld be appreciated.......]

Thank You in advance for your assistance papacowboy