fuel pressure gauge reading?
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Old January 22nd, 2008, 03:41 PM   #1
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fuel pressure gauge reading?


What is it suppose to read at? I just want to make sure that its working right? Mine is reading around 30psi constantly, and recently jumped to 40 psi. It will vary when acceleration and downshift but i was just wondering
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Old January 22nd, 2008, 04:00 PM   #2
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FP should be 39.5psi - vacuum in psi (~= "/2) or plus boost. So at idle and 20" vac (~10psi) it should be ~30psi. At WOT (NA) is should be 40. At WOT (with 10psi) is should be 50.
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Old January 22nd, 2008, 04:47 PM   #3
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ok so mine is ok. thanks
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2001 mustang gt 5 speed
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1965 Mustang
302 with 4 Barrel edelbrock 600cfm, T5 transmission, Hurst short throw shifter.
In the process of restoring it...
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Old January 22nd, 2008, 04:49 PM   #4
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Mine reads 19 PSI at idle...
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Old January 22nd, 2008, 05:16 PM   #5
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Many electronic gauges suck (even $$$ ones). I switched to a mechanical gauge with an isolator and its WAY faster to respond and dead on too.
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