Dug around in the forum for a couple of hours but couldn't find any ideas.....
Daily driver went to start, cranked but no start. Replaced crankshaft position sensor fired right up ran great for a week then again crank but no start. Bad CPS from O'reilys? replaced, crank no start. Replaced camshaft position sensor, crank no start. Checked fuel pressure, none. Replaced fuel pump relay, no pressure. Replaced fuel pump and filter, great pressure, crank no start. Replaced coil, crank no start. pulled front three plugs, all pretty worn so replaced all six plugs after checking to make sure they were properly gaped and replaced wires. Crank but no start. No spark at plugs. Another bad CPS? MAP sensor? bad PCM?

 

You did all but check your Auto Shutdown Relay. It will prevent the van from starting because of a short or bad relay. Its in the relay/fuse panel under the hood. Read under the lid to see where it's at. Have it tested or replace.
Also check for voltage on the ignition coil wiring (mines a 4 cyl, not sure which one is power on the V6, research that because you put the neg lead of voltmeter on batt ground and improper reading can damage PCM.