Truck confirmed hard start.  Cannot run unless driver aids throttle. Found no DTC's.  Used scan tool to monitor FICM voltage and ICP, IPR % good.  Watched cam and crank sync toggle to NO from YES and

Upon cold start up vehicle has extended crank time. Vehicle has a hiss sound from underhood area. Started truck cold and found 20 seconds of crank time.  After truck was started the hiss sound was ve