How much fuel pressure should there the between the fuel filter and injector pump? I found a banjo bolt with a tap hole where I could hook a Pressure gage .My reading were 10psi at idle 9 psi at wot going up a hill . Does that sound low? I've look all over the internet for the speck and can not find them. This is my first cumming Diesel pick up.It's a 1993 2500 LE with 75000 miles on it. For the most part it's in nice shape, needs some minor body work. At lest I don't Thave to worry about the first scratch or dent because there are already there .
Looks like it's going to be a good old truck.

 

Welcome to DTR.

That's great pressure, and what you'd expect from a healthy lift pump and a clean filter. Minimum acceptable is 3 psi per Cummins.