03 7.3 excessive crank time 4 seconds

[vince harding]

I have hooked a simPle scan tool up at auto zone and no codes. Hpop has oil at all times, can a bad ipr or icp sensor cause this? Maybe injector o-rings? I am getting ready to put stage 1 injectors in. Although if I shut the truck of and start it right away it usually fires right up just fine. It's as if sOmething is bleeding off or losing prime. Any suggestions ?