Ford Truck Enthusiasts Forums
Older, Classic & Antique Trucks
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???

Reply Subscribe

Search this Thread

Old

Oct 7, 2012 | 12:28 PM

#1

audiophile1424

Thread Starter

|

New User

Joined: Aug 2012

Posts: 21

Likes: 0

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

Reply

Old

Oct 7, 2012 | 12:58 PM

#2

Lazy K

Post Fiend

Joined: Jan 2005

Posts: 8,402

Likes: 10

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

Reply

Old

Oct 7, 2012 | 01:18 PM

#3

audiophile1424

Thread Starter

|

New User

Joined: Aug 2012

Posts: 21

Likes: 0

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

Reply

Old

Oct 7, 2012 | 01:22 PM

#4

dustybumpers

FTE Legend

Joined: May 2008

Posts: 56,542

Likes: 0

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

Reply

Old

Oct 7, 2012 | 04:53 PM

#5

audiophile1424

Thread Starter

|

New User

Joined: Aug 2012

Posts: 21

Likes: 0

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 ??

Reply

Old

Oct 7, 2012 | 05:35 PM

#6

dustybumpers

FTE Legend

Joined: May 2008

Posts: 56,542

Likes: 0

From: In my own world

Yes, the pumps should come on then.

Reply

Old

Oct 8, 2012 | 10:14 AM

#7

Conanski

FTE Legend

Joined: Jun 2006

Posts: 31,930

Likes: 1,499

From: Ottawa, Ontario

Sounds like your in-tank pump is dead.

Reply

Reply Subscribe

Related Topics

Thread

Thread Starter

Forum

Replies

Last Post

Needs some help 2.3l efi stalling issue

T-ford

1983 - 2012 Ranger & B-Series

3

Aug 17, 2014 07:30 AM

1996 F250 5.8 fuel pressure issue

digicon

1987 - 1996 F150 & Larger F-Series Trucks

12

Feb 22, 2014 03:30 PM

fuel pressure- hard starting?

dwayne21

1987 - 1996 F150 & Larger F-Series Trucks

11

Jul 4, 2010 05:45 AM

High fuel pressure question??

sainty333

Fuel Injection, Carburetion & Fuel System

5

Jan 2, 2007 02:58 PM

power to fuel pump

Tex311

Bronco II

12

Jan 23, 2004 10:50 PM

Reply Share

First
Prev
1 / 1
Next
Last

All times are GMT -5. The time now is 06:31 AM.