If you have zero pressure at the vaporizor first thing i would check is to make sure the lock off solenoid has power and is opening,also is a small screen filter inside the cover on the lock off assembly, can see if that is plugged and causing a issue,it is held on with four small bolts in a square pattern,watch you dont loose the oring that is attached to the cover. can blow the screen out with low pressure air.
If the lock off solenoid dosent have power check all of your fuses and relays and check the wiring and connector at the solenoid.