Fuel pressure gage used to read, 75psi, now read less then 10, truck runs good

Howdy 062,

Thanks, it's pouring down rain here, will be for the next few days, I'll be working on the truck this weekend when it's supposed to clear up I'll pull the gage panel then and take a look.

Dave

 

Howdy All,

Thought I would update this thread. I changed fuel filters as part of my service, I was mistaken in my first post as to gauge reading. The gauge is actually reading past the max reading and stopping at a pin just below the 5psi reading on the gauge. The gauge is now stuck at 50psi when the engine is shut down and the needle will go past 100psi and register at the pin just under the 5psi reading on the gauge when running. So I know I have plenty of fuel pressure.

I removed the gauge, cleaned it,blew air into it, the needle never mover from 50psi. Reinstalled gauge it again went past 100psi and stopped at the pin just below the 5psi reading. So I am thinking the gauge has bit the dust. It must be contaminated inside not allowing the needle to go back to zero and it's reading from where it is stuck when the engine is not running. So now it's off to the Peterbilt store I hate to think of what this gauge will cost I have seen used ones online for over a 100 dollars, I can't see buying something like this used and taking a chance on it's not working or going bad in a few miles.

Dave