Ford Repair: spittin and sputterin, max speed 2, fuel pump filter

Question
I have a 97 F350 With a throttle body FI . It was spitting, Sputtering, and Backfiring max speed 2 mph I Changed the Fuel Pump, Filter, Pressure sensor, It worked for a week. Now its doing it again after it reaches operating temp. The code was EGR so I changed The EGR valve and the relay and it is still doing it. It shows good fuel PSI

Answer
hey there, there are so many possiblities to a problem like this. it can be anything from bad mechanical or electrical timing, plugged catalytic converters, it is a good idea to have this diagnosed properly, because it can get expensive if you just throw parts at it. is there a chance that the fuel is contaminated?? is there a check engine light on?? let me know with a little more detail. thank you
Chris P