1992 Toyota Camry urgent

Engine Performance problem
1992 Toyota Camry 4 cyl Two Wheel Drive Automatic

the problem happens sussenly once in a while. After starting my engine it runs good. After a few hours drive sudddenly when I pump gas the engine goes off as if ther is no fuel in the car. Again when I start the engine the problem goes off. I chenged fuel pump, sensors, plugs, coil, distributor, fuel filter, chekd injectors, but still having this rare ptoblem. Also cheked the controller of injectors. Plss help.