My brother inlaws old man has a 01 2500 with a auto, He has complained that it stumbles and it will only do a 120k on the freeway now, I know they are bad for lift pumps. could some help me find a link where to connect to check fuel psi and also what we should see for psi, i did a quick search but no luck, i'm a 12v guy so 24V are new to me.
Any help would be great!

Jack

 

There is a shrader valve on the drivers side of the motor at the injection pump. I am seeing around 15 at idle, 12-13 cruise and 8-10 at WOT.