Fuel system diagram - Ford Powerstroke Diesel Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 10 Old 03-30-2014, 03:34 PM Thread Starter
Mod Newbie

 
dhanna6powerstroke's Avatar
 
Join Date: Feb 2008
Location: Bloomington, IN.
Posts: 13,144
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Thanks: 6
Thanked 141 Times in 133 Posts
Feedback Score: 2 reviews
Fuel system diagram

Anyone have a diagram of how the fuel system flows on the OBS trucks? I've got a 96 here and someone has hacked on the fuel lines and I'm not sure that they are right. I have no fuel getting to the bowl so I wanna make sure the lines are right and if they are then I'll move to the pump. Thanks guys.

dhanna6powerstroke is offline  
post #2 of 10 Old 03-31-2014, 05:55 PM Thread Starter
Mod Newbie

 
dhanna6powerstroke's Avatar
 
Join Date: Feb 2008
Location: Bloomington, IN.
Posts: 13,144
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Thanks: 6
Thanked 141 Times in 133 Posts
Feedback Score: 2 reviews
Anyone?

dhanna6powerstroke is offline  
post #3 of 10 Old 03-31-2014, 06:56 PM
Compression Ignition Addict
 
Patrick Feeley's Avatar
 
Join Date: Oct 2011
Location: Tehachapi, CA
Posts: 2,210
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Thanks: 0
Thanked 79 Times in 77 Posts
Feedback Score: 0 reviews
Not sure if this is what you were looking for. Quality isn't great. Cheers!
Attached Files
File Type: pdf Fuel Sys.pdf (38.3 KB, 123 views)

1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed

SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.
Patrick Feeley is offline  
post #4 of 10 Old 04-01-2014, 04:51 PM Thread Starter
Mod Newbie

 
dhanna6powerstroke's Avatar
 
Join Date: Feb 2008
Location: Bloomington, IN.
Posts: 13,144
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Thanks: 6
Thanked 141 Times in 133 Posts
Feedback Score: 2 reviews
According to the diagram it comes from the tank and then runs through the pump and then to the filter. Do you check for fuel pressure at the schrader valve on the side of the filter housing? Do you have to have a special fitting to test pressure like the 6.0's? Sorry for the questions but I'm more of a 6.0 guy.

dhanna6powerstroke is offline  
post #5 of 10 Old 04-01-2014, 05:20 PM
Compression Ignition Addict
 
Patrick Feeley's Avatar
 
Join Date: Oct 2011
Location: Tehachapi, CA
Posts: 2,210
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Thanks: 0
Thanked 79 Times in 77 Posts
Feedback Score: 0 reviews
Basically, It runs from the tank to the pump (1st stage, low pressure), to the filter, back to the pump (2nd stage, high pressure), out of the pump to the rear of the heads and into the fuel rails. Then out the front of the heads to the fuel pressure regulator (FPR) attached to the bowl, and back to the tank. Yes, you do measure the pressure at the Schrader valve on the FPR. If you have the correct fitting, you can screw on a 0-100 psi liquid-filled gauge (glycerin dampens the pulsations for better reading) onto the valve or like many folks do, just use a rag and a tire pressure gauge. You could also remove the Schrader fitting and use a 1/8 NPT fitting, but be very careful to not overtighten and crack the regulator housing! You should get a minimum of 25 psi at 100 rpm crank speed. At idle you should have at least 40 psi. Cheers!

1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed

SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.
Patrick Feeley is offline  
The Following User Says Thank You to Patrick Feeley For This Useful Post:
Brock97 (04-01-2014)
post #6 of 10 Old 04-01-2014, 05:42 PM Thread Starter
Mod Newbie

 
dhanna6powerstroke's Avatar
 
Join Date: Feb 2008
Location: Bloomington, IN.
Posts: 13,144
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Thanks: 6
Thanked 141 Times in 133 Posts
Feedback Score: 2 reviews
I'm gonna check it tomorrow if it's not raining. I'm almost positive the pump is junk. I really appreciate the help.

dhanna6powerstroke is offline  
post #7 of 10 Old 04-05-2014, 03:34 PM Thread Starter
Mod Newbie

 
dhanna6powerstroke's Avatar
 
Join Date: Feb 2008
Location: Bloomington, IN.
Posts: 13,144
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Thanks: 6
Thanked 141 Times in 133 Posts
Feedback Score: 2 reviews
Well, finally got a chance to put a fun pressure gauge on it. Doesn't even move the gauge. Pressed the valve core in while my wife cranked the engine over and it barely pushes the fuel out. I'm gonna say the pump is junk.

dhanna6powerstroke is offline  
post #8 of 10 Old 04-08-2014, 12:04 PM Thread Starter
Mod Newbie

 
dhanna6powerstroke's Avatar
 
Join Date: Feb 2008
Location: Bloomington, IN.
Posts: 13,144
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Thanks: 6
Thanked 141 Times in 133 Posts
Feedback Score: 2 reviews
I got the fuel pump replaced and I'm now getting fuel fuel to the fuel bowl but this thing still won't fire. I have AE but for some reason I can't get it to read anything. It shows all the PIDS available but won't show any info on the graphs. If I shoot a little starting fluid in the intake (I know, I know) it acts like it wants to hit. Any info in the direction to go is appreciated. Truck has a new fuel pump, new OE HPOP and new IPR valve.

dhanna6powerstroke is offline  
post #9 of 10 Old 04-28-2014, 05:26 AM Thread Starter
Mod Newbie

 
dhanna6powerstroke's Avatar
 
Join Date: Feb 2008
Location: Bloomington, IN.
Posts: 13,144
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Thanks: 6
Thanked 141 Times in 133 Posts
Feedback Score: 2 reviews
Got it figured out. Swapped PCM's with a known good one with no change. Swapped in a different IDM and she finally started. Runs great for having sat for almost 2 years. Thanks to Jugernaut (Dale) for the help and to Twinjracing for the use of the IDM.

dhanna6powerstroke is offline  
post #10 of 10 Old 04-28-2014, 05:53 AM
Compression Ignition Addict
 
PSDTV21's Avatar
 
Join Date: May 2012
Location: Wabash, IN
Posts: 664
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 2
Thanked 12 Times in 12 Posts
Feedback Score: 1 reviews
Glad to hear you got it figured out

-Tyler

1994.5
Efuel, Valair 500hp, D60, Hydra w/PHP tunes


PSDTV21 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome