I have a 2001 Dodge 2500 with the 8-liter V10 & having long cranking times before it starts cold. I am in the process of checking fuel pressure because I'm pretty sure it doesn't hold pressure in the fuel rails when it sits any length of time, usually 10 minutes or more. I did push the schrader valve in on the test port & NO fuel sprayed out. (When it wasn't running of course) It runs fine after it starts a few seconds later, but does have a misfire at first start, like injectors aren't getting enough fuel right away, but runs good after that. I think the pump is working OK but the residual valve, or whatever it's called, is not holding pressure in the fuel rails & leaks back into the tank. It's basically used for hauling scrap metal once a week & I would like to fix this problem on the cheap if I can. Has anybody installed a 1-way pressure valve in the fuel line to keep the fuel pressure in the system, instead of replacing the pump module. I have read on a Jeep forum they do this because it's a problem too.