6.0 fuel presure high - Ford Powerstroke Diesel Forum
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post #1 of 18 Old 07-27-2012, 08:10 AM Thread Starter
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6.0 fuel presure high

i have a 03 f250 with the 6.0 i installed a fuel pressure gauge about 9 months ago and i did the blue spring also it was running about 58 to 63psi then i notice it about 2 weeks ago it went up to about 70 now it is up to 75 what could this be will it hurt anything running at 75psi i changed the filters and drain the valve on the fuel pump let me know what yall think and thanks
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post #2 of 18 Old 07-27-2012, 05:27 PM
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This is normal with the bluespring upgrade.


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post #3 of 18 Old 07-27-2012, 06:04 PM
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it's not normal for it to climb after a few months

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post #4 of 18 Old 07-27-2012, 09:50 PM
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It ain't normal to see a climb.

However, running at 75psi isn't going to pose much of a problem as long as that is your pressure at idle, and it goes down as you are driving. 75psi is the upper limit for the injectors, at which point they start leaking by the O-rings into the oil lines. The injector bodies are tested much higher than that, however, excessive wear and failures may result.

Have you already changed the filter?

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post #5 of 18 Old 07-28-2012, 07:38 AM
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He stated He changed the filters
I agree it's not at an alarming High PSI ,, but the climbing is a concern ,, the only reason for that in my mind would be a return issue , or a regulator problem

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post #6 of 18 Old 07-30-2012, 08:58 AM Thread Starter
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ok now the pressure is at 80 psi at idle whats the max psi before it hurts something? and what do yall think i should change r check the pump on the frame rail is only about 8months old
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post #7 of 18 Old 07-30-2012, 09:16 AM
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Blockage at return path

Regulator issues

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post #8 of 18 Old 07-30-2012, 09:34 AM
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I would disassemble the fpr, and check for misalignment and trash.

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post #9 of 18 Old 08-01-2012, 03:31 PM Thread Starter
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ok i disassembled the fpr it was all clean i checked the alignment it all looked good checked the return line all looks good im up to 95 psi is there anything yall could think of that might be causing this problem? i parked it now im sure its not good to run it with that much pressure

Last edited by meche2326; 08-01-2012 at 03:43 PM.
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post #10 of 18 Old 08-01-2012, 05:48 PM
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I would suspect maybe a misinstall of the regulator or something sticking in that regulator assembly while some increase is understandable, system reaching equalibrium etc, this continual climb is indeed not normal. When u checked the HCFM did u check it's
pressure regulator? Was there any extra parts left over in the spring kit?


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