started last week dying on me. would quit i would crank and crank and it would start and run for about 4 secs. got it home had no fuel pressure. figured out lift pump not sucking fuel (RAPTOR) so i purchased a new fass pump and installed. running about 16psi now. but still doing the same thing. no codes. and ideas where to look next?

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this is on my 2006 btw. all stock

 

Are you measuring the pressure before or after the last filter? If it is before, change filters. (I say this because some people keep the factory fuel filter housing)