Van cranks but does not start

I changed the ASD relay it started right up, drove it for about 15 miles running fine then it just shut off. Tried starting it again cranking but no start. So I put another relay in now it cranks fires up but shuts off immediately.

I have checked most but not all as of yet. It has gone back to just cranking but now when the key is released from start to run position it continues to crank. It don’t do it when you go from off on run. Just when you turn the key to start and release in run position it does.

I finally checked all wires and connections all seem fine. I did spray some throttle body cleaner it did fire then stalled. So apparently not getting fuel. Again you can hear fuel pump kick on when key turned. I’m now thinking filter or pressure regulator the thing is they are in the fuel pump module.

Sorry it has taken awhile to reply back. Tested fuel pressure and it was low. Ordered fuel pump since regulator and filter strainer part of module. Took a few days to get it in. Replaced it and is now running fine. Your diagrams and instructions were of great help. The only problem I had was disconnecting bottom filler hose seem they put some type of sealer on it and I had to cut it to get it off then tried to get replacement for it nobody sold it not even dealer they all wanted me to buy the whole filler neck that came with it. Finally found one the would fit that had same ID on both ends of hose but was for GM. But it worked. Again they you for all your help will definitely recommend you!