1994 Chevy S-10

Engine Performance problem
1994 Chevy S-10 6 cyl Two Wheel Drive Automatic

i got this truck with some problems but cant figure out what is wrong with it when it would start up it would run but it would run really rough when you put it into gear it would cut out and die. We replaced the plugs wires and spark plugs, and the fuel filter that is located under the truck on driver side between the wheels, we have also changes the air filter. It has now gottin to the point where it will not start it sounds like it isnt getting any fuel. To keep it running.