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1987 - 1996 F150 & Larger F-Series Trucks
fuel pressure???

1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

fuel pressure???

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Old

Oct 7, 2012 | 12:28 PM

#1

audiophile1424

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fuel pressure???

hello everybody i have an 88 f250 with the 5.8 and had a question about what my fuel pressure should be at? at higher rpms it seems to bog out a bit. any help would be appreciated

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Old

Oct 7, 2012 | 12:58 PM

#2

Lazy K

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Around 34psi at idle going to around 40psi at wide open throttle (WOT) or with the vacuum line unplugged from fuel pressure regulator (FPR)

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Old

Oct 7, 2012 | 01:18 PM

#3

audiophile1424

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thank you!!
i will check it right now
i grounded the fuel pump wire at the diagnostic port to check the pumps and the inline one runs but after i disconnect it i dont hear anything so i disconnected the fuel line after the tank selector and a get no fuel out of the tank pumps so im sure im going to have low pressure

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Old

Oct 7, 2012 | 01:22 PM

#4

dustybumpers

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From: In my own world

You will not have power to the fuel pump beyond the inital charge, unless the engine is running.

Put a pressure guage in the line,and start the truck

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Old

Oct 7, 2012 | 04:53 PM

#5

audiophile1424

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so even though i grounded the the fuel pump wire at the diagnostic port the pump in the tank will still only pulse on after key turn on ??

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Old

Oct 7, 2012 | 05:35 PM

#6

dustybumpers

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From: In my own world

Yes, the pumps should come on then.

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Old

Oct 8, 2012 | 10:14 AM

#7

Conanski

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From: Ottawa, Ontario

Sounds like your in-tank pump is dead.

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