I just installed an edge juice/attitude combo today. Everything works fine and the truck runs great. The only problem I have is that the fuel pressure drops and peaks for no reason it seems. It usually drops to 3-4psi when you idle and 10-15psi at cruise 8-9psi WOT. The odd thing is that there seems to be no rhyme or reason to when it drops and peaks. What I posted seems to be the most common but is not how it always acts.

I have bled the lines everywhere except at the injectors. The VP-44 is only about six months old as well as the LP. Fuel system is stock.

 

I got the same issuses with the x-monitor.

 

i had the same thing about two weeks ago and it was my LP and it was only 6 months old and 10k on it. switched out my LP since it was under warranty and it is steady as can be. change out that Lp and im sure it will be back to normal good luck.
https://www.dieseltruckresource.com/...pressure+crazy heres my thread on it.

dieselfan.

 

You could have a bad ground on your gauge hookup.