High Fuel Pressure - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 05-07-2013, 06:01 PM Thread Starter
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High Fuel Pressure

Hey folks I tried searching and couldn't find an answer so here we go. I installed a fuel pressure gauge yesterday and at idle I'm getting right at 78 PSI. I read in the monitoring sticky that 75 is max. When I smash the skinny pedal I'm seeing 60-65 PSI. Am I being overly paranoid?

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post #2 of 4 Old 05-08-2013, 05:43 AM
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I think I read that same sticky..and an extremely high fuel pressure can damage the injectors. I however do not know that for a fact, but someone will. I'd be just as paranoid

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post #3 of 4 Old 05-08-2013, 07:24 AM Thread Starter
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Originally Posted by dxusmc View Post
I think I read that same sticky..and an extremely high fuel pressure can damage the injectors. I however do not know that for a fact, but someone will. I'd be just as paranoid
Yeah I've read that higher than 75 O-rings start blowing out. Truck runs great so maybe I'm worrying about nothing.

2005 F-250 4X4
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Leveled, Sinister Egr Delete, Studded, Sinister Coolant Filter, Rotella EC1 Coolant, 58v FICM, 6.4 Banjos, Blue Spring, SCT Tuned by Innovative, TSD
and the Wildman, Edge CTS W/ EGT Probe, 4" Turbo back straight pipe, CCV mod, 08 Tails, 08 Pan and filter, 08 Rear Diff Cover, 03 whistler

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post #4 of 4 Old 05-08-2013, 08:22 AM
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65 psi is the most you need to run and it has been proven that higher pressures actually hurt HP output due to liquid dynamic reasons that are way over my head. HIGH fuel pressures, such as ~100 psi which can be had with a Gillette fuel regulator spring, are risky. I tried one for about an half an hour but that kind of pressure scared the crap out of me so I gave it to a bud that was braver (??) who ran it for a little over a year untill he started getting diesel in his coolant. Was it due to the high fuel pressure IDK.
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