on the back of the motor where the fuel lines come in there is a fuel pressure test port. It will have a little black cap on it. Use it to check the fuel pressure. I dont have the spec for the pressure on hand, but if is too low the injectors wont spray.They are electronic injector solenoids with poppet style injectors. meaning even if the solenoid is turning on, the injector wont spray untill the pressure is high enough.
If there is no pressure then move on to checking the electrical system for its 2 second prime pulse from the ECM , then the OP switch circuit for maintaining pump voltage after start.Check for ANY pressure first.then go from there.