Astrovan no start

Dave again, it started for a couple seconds with quick start down the carb with the flap open. So its not getting fuel.A new pump was put on last year/ humm.I changed vcm (computer in it) no difference so it must be fuel again, also the ignition switch went weird about a month ago but fixed itself with battery disconnect.I tested all the fuses with key foward and have power to all of them, any thoughts thanks
Where is the fuel presuere regulator? In the tank? Dave

Ok, bought a fuel pressure gauge and truck reads 10 psi and drops like a rock. Found my problem.
Hooked it up to car and it reads 50 psi and holds steady. Didn't think it was fuel pump because its only a year old, thanks for all your help anyone out there who has a no start car or truck check the fuel presure first, saves alot of time. Dave