Join Date: Mar 2009
Location: Magee, MS
Thanked 42 Times in 34 Posts
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It's true that the pressure relief valve is more likely to fail on a truck demanding higher rail pressures, but it is still possible that your's has failed. Has your truck thrown a P0087 for low rail pressure? Usually you will see all three together ( p0087, p1011, p000f ). even without the low rail pressure code I would point my finger at the valve. There is low pressure return line on the side of the rail (next to the valve) that you could check for fuel. If you have ANY fuel coming from the return then your valve is bypassing. You could get the test fittings from miller tool, but if I were you I would just replace it with a plug from H&S or Sinister Diesel $50. Since your not tuning the truck in any way it would be very unlikely that you could over pressureize the rail. Plus its practically undetectable if you had to take the truck to a dealer for other service.
07.5 6.7L 2500 Lone Star 4x4, Ranch Hand bump, 35" Dynapro MT's, Hella 700FF's, XRT Pro, HTT manifold, S464 Turbo ,Edge CTS, FULL deletes, 5 In TBE, Smoked Recons, SunCoast Trans, ARP Studs, dual CAT fuel filters, 100HP Injectors, FASS HPFP, Big line kit, GDP ff delete, Sinister Rail Plug, TGC 3.5" Lift