Ok here we go I just replaced my overflow valve with A Larry B overflow valve. Now my fuel pressure is at 30 p.s I at idle. It's supposed to be according to the instructions 17 p.s I at idle and 25 psi on a rev. What could be the problem 2y I have such high fuel pressure?I also have a miss that hat I have had since I bought the truck. I replace fuel injectors, number 6 fuel plate, timing bumped to 16.5, 5" straight pipe. I dunno if its related. Any help would be great

 

is the larry b over flow valve a high performance valve?

 

No its not....its weird now when I first got the ofv it was hitting that pressure all the time now it is at like 22 psi at idle but sometimes will sit at 30 again it fluctuates its really weird....the gauge I have is brand new autometer mechanical so I know its right.....I have no idea