fule pump?

i was sitting at the drive tru ordering food whne my car stoped running ffor no reason ... the check engine light didnt turn on befor it died nothin jsut quit. soo i re started it it ran fine for about a minute or so then quit again, but this time the check engine light flashed like it couldnt deside if it wanted to turn on or not. soo got a tow home tryed looking at the obd codes and nothin flashed not even the default codee so i thought to check spark a fuel pressure the normal things and all seemed ok i had 42 pis in the fule pressure rail. soo i thought maybe the ecu was bad and i got one for cheap and instaled it nothin same problems but this time no fule pressure at all ... soo now im in the middle of changing the fule pump i jsut got it out of the gas tank and im havning a bad feeling this isnt it ... i have changed the crank position sensor, egr valve, icm, iat, map, all new plugs, wires, fule filter, and many more in the last year pretty much all new elcetronics now and the ppiece still doesnt run good so anything would b great..

Please post the year for proper answers, also may want to use spell check.