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Fuel Pressure dropping

6897 Views 5 Replies 4 Participants Last post by  hutt1
I have an 05 6.0 with 160,000 miles on it that the fuel pressure was about 45 psi at idle and went below 40 under load. I installed a blue spring kit and the pressure at first was about 65 psi and fairly steady even under load. All is good. Now after a couple months the pressure has dropped to 40 at idle and the auto meter gauge I have installed fluctuates constantly. Filters were changed about 10,000 miles ago. Truck runs good, no power loss and no codes. Just lower fuel pressure. Any ideas?
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Thanks everyone, I found the problem. When I removed the cover to take a look at the spring I found that the seal on the bronze plug had split. I replaced the seal and reinstalled everything and now I'm running just over 65 PSI at idle and the gauge is steady. Next I will change the filters and get it out on the road.
Thanks again for all the comments.
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