Chrysler Repair: 94 van wont run; fuel pump?, fuel pump relay, fuel burns

Question
van ran fine parked wouldnt start 3 days later fuse ok fuel pump runs but has
very little psi  no reading on gauge @fuel rail  minimal @fuel filter but will
get fuel to the rail , the injectors seem to be open and closing consitiently
when u listen .i instaled  new filter  new psi  regulator.if your pour fuel into
the intake it runs fine till fuel burns up . what is voltage @ the pump
connection on tank is lack power possibly = lack psi  

Answer
Hi Brannon,
The fuel pump runs on battery voltage. If it is sounding normal then I doubt it is the voltage/current as the cause. You could try measuring voltage and then jumping across the points of the fuel pump relay to verify that 12V is there and getting to the dark green/black wire that goes to the pump. That jump would be from the back pin to the front pin, with 12V showing on the back pin. If that shows 12V then you would suspect the pump or possiblly the internal pre-filter inside the tank. Thus you would be going to have to drop the tank to get to the pump and its plug, where you could verify that there is 12 between pins 1 and 4 of the plug to the pump.
Please let me know what you learn. Use the "thank and rate" tab to get back to me quickly and without having to wait for my 'availability'. There is a space for comments.
Roland