cranks no start

this is first time on here so this may be repeat thread if so sorry guys, I have a 92 C20 that died while driving, replaced fuel pump and filter, ran rough so replaced all ignition componets too, after 100 miles injectors wouldnt spray, checked with a noid lite they had pulse so replaced injectors, now about every 100 miles they seem to quit, i have good fuel pressure, cleaned tank, I am stumped on this one need some help please.....

fuel pressure regulator, check it

fuel pressure regulator, check it
thanks for the help JW but it went back and done same thing again does anyone think it might be the pcm or could it be something i am missing obvious? anymore ideas guys

check the connectors the go to the fuel pump

I wasn't getting pulse to my fuel injectors,it was a wire going to my firewall,the wire was broke under the instalation,i found it using a test light,hope this helps