here is what mine did and what I did to fix it. I did have a programed PCM from Nelson Performance so I know my VATs were off and everything was good to start with. Mine had sat for a while before I got it and teh injectors gumed up. they were pulsing and everthing but no fuel could go thru I unhooked my coil packs and raised my injector fuel rail and all teh injectors I hooked them up one at a time and had my son turn the engine over while I tapped on the injector till it sprayed fuel. I did this on all 8 then returned them hooked it up and it fired u p the first time. After checking your fuel pressure I would check that.
Good luck
Dave