1993 GMC Sierra 1993 Sierra Wont Start

I have a 1993 GMC Sierra pickup that has just started to act up. It ran fine one day, and the next it day it wont start. It acts like it is flooded. I changed the fuel filter, cap, rotor, module, coil, and spark plugs and it still won't start. The throttle body is alternating pulsing fuel into the engine, but no start. If I hold the footpedal down to the floor, it tries to start but still acts flooded, and tries to start.
Any Ideas?