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Old 02-23-2008, 07:03 PM
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FG PSI

Does the fuel pressure remain constant. If I get 65 PSI at the shreader valve at idle what can I expect to get at 2000 RPM? Do I need to install the FPG inside the truck?
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Old 02-23-2008, 07:31 PM
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need gauge inside to know exact but it does drop under load
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Old 02-24-2008, 06:37 AM
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Theoretically then at idle (65psi) should be max if it drops under load and the under hood guage should be ok. Thanks I appreciate it.
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Old 02-24-2008, 09:07 AM
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on mine at free way speed I see about about 72 psi then when I floor it it drops to about 45 then when I let off it jumps up to 80 . hope that helps
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Old 02-24-2008, 02:56 PM
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thanks, it helps a lot.
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Old 02-24-2008, 03:00 PM
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where do hook the pressure gauge up on the OBS 7.3?
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Old 02-24-2008, 03:49 PM
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I hooked mine with the valve that reliefs fuel pressure i can will show you all
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Old 02-24-2008, 03:50 PM
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yeah if you had some pics that be great i tried to figure it out but wasnt sure where exactly to put it
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Old 02-24-2008, 03:59 PM
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this is were I hooked mine up on my obs if i am wrong now would be the time to tell me

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Old 02-24-2008, 04:06 PM
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thats where i was think of, where did you get a electric FP gauge and how much did it cost ya?
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