Go Back   Ford Truck Enthusiasts Forums > Diesel > 1999 - 2003 7.3L Power Stroke Diesel
Sign in using an external account
Register Forgot Password?


1999 - 2003 7.3L Power Stroke Diesel SPONSORED BY:

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 07-19-2014, 01:38 PM
Traildust's Avatar
Traildust Traildust is offline
Freshman User
 
Join Date: Feb 2004
Location: Fallon, NV
Posts: 48
Traildust is starting off with a positive reputation.
Fuel Pressure Question

Over the last month or so my fuel pressure went from 65 psi down to 53 psi and I have done everything I know and it still remains at 53 psi. I checked the FPR, replaced the poppet, replaced the gold spring with the black one which is suppose to produce 67 to 70 psi. With no luck at the regulator I dropped the tank looking for any obstructions and found none, screens were clean. My last try was replacing the fuel pump with a new Bosch OEM pump. Now my fuel pressure is still at 53 and under hard acceleration it will drop to 45 psi. I would like to see 65 psi again but I am out of ideas. Anyone have any ideas to help me out?
Bill
__________________
2002 F350 CC, LB, 4X4, 7.3, 6 Speed. Billet Compresor Wheel. Ford AIS Filter. PHP Hydra. Towing 2013 Arctic Fox 27-5L 5th. Wheel.
Reply With Quote
  #2  
Old 07-19-2014, 02:45 PM
jasonc76 jasonc76 is offline
Senior User
 
Join Date: Sep 2013
Posts: 138
jasonc76 is starting off with a positive reputation.
Check the filter?
__________________
1999.5 f350 CC LB 172k miles, HD4r100, AFE stage II, 4" mbrp SS turbo back, Hpx, DP F6, fuelab pump, full regulated return, remote start, 5.5" fabtech lift, ISSPRO EV2.
Reply With Quote
  #3  
Old 07-19-2014, 04:34 PM
Traildust's Avatar
Traildust Traildust is offline
Freshman User
 
Join Date: Feb 2004
Location: Fallon, NV
Posts: 48
Traildust is starting off with a positive reputation.
New filter but - now that I think of it, when I replaced the fuel filter is when this started.
Bill
__________________
2002 F350 CC, LB, 4X4, 7.3, 6 Speed. Billet Compresor Wheel. Ford AIS Filter. PHP Hydra. Towing 2013 Arctic Fox 27-5L 5th. Wheel.
Reply With Quote
  #4  
Old 07-19-2014, 08:16 PM
dn29626's Avatar
dn29626 dn29626 is offline
Posting Guru
 
Join Date: Oct 2009
Location: South Carolina
Posts: 1,387
dn29626 has a very good reputation on FTE.dn29626 has a very good reputation on FTE.dn29626 has a very good reputation on FTE.dn29626 has a very good reputation on FTE.
I like Purolators. What did you install?
__________________
David Norwood. 2001 F350 7.3 DI CC dually purchased new.
Alternative Fuel User Since 2003-vo is always in my fuel. Only one fuel tank. GPI/CIM-TEK spin on filterhead and 10 micron filter.Superchip. Hutch and Harpoon mods 2010. Diesel inline wix (33007 or 33972) filter between tank and Airtex E2236 fuel pump (rated to 110 psi).Fuel pressure gauge. HOH for fuel line heat from tank to 12v lift pump & two 12v 36" heaters. July of 2013-265/75/16 E range BW Michelin.
Reply With Quote
  #5  
Old 07-21-2014, 12:29 AM
retiredsparky retiredsparky is offline
Senior User
 
Join Date: Sep 2011
Location: Vancouver
Posts: 385
retiredsparky has a good reputation on FTE.retiredsparky has a good reputation on FTE.
Fuel filter problems are probably a common cause of power loss in these trucks. Not all are the same quality!
Reply With Quote
  #6  
Old 07-21-2014, 05:59 AM
A/Ox4's Avatar
A/Ox4 A/Ox4 is offline
9 ECHO 1
 
Join Date: Aug 2009
Location: Ventura, CA
Posts: 11,571
A/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputationA/Ox4 has a superb reputation
Stick with Motorcraft or the Motorcraft manufacturer (racor?.. Someone check me). There is a lot of deviation from the OEM standard in the aftermarket. For example the WIX filter has a micron rating HALF that of the OEM spec at best.
__________________
- Trey PAA Member #110
2002 F250 XLT CrewCab Short Bed 4x4 7.3L
My How-To Video Library
SoCal Chapter Member (Join us HERE)
Reply With Quote
  #7  
Old 07-21-2014, 03:26 PM
Traildust's Avatar
Traildust Traildust is offline
Freshman User
 
Join Date: Feb 2004
Location: Fallon, NV
Posts: 48
Traildust is starting off with a positive reputation.
I have always used Racor or OEM. The drop in fuel pressure wasn't caused by the fuel filter I just replaced but by something in the FPR as near as I can tell. I have a bunch of parts for the FPR and ended up mixing the Billet Housing with the black spring with a .075 shim added. That put my fuel pressure at 69 psi. I am sticking with this until I find out what caused it to drop and why I have to put so much spring pressure on it to get to 69?
Bill
__________________
2002 F350 CC, LB, 4X4, 7.3, 6 Speed. Billet Compresor Wheel. Ford AIS Filter. PHP Hydra. Towing 2013 Arctic Fox 27-5L 5th. Wheel.
Reply With Quote
  #8  
Old 07-21-2014, 09:36 PM
white Buffalo's Avatar
white Buffalo white Buffalo is offline
Postmaster
 
Join Date: Sep 2006
Location: Sioux Falls, SD
Posts: 4,517
white Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to behold
Where are you reading fuel pressure from? The bowl or from a regulated return?
Reply With Quote
  #9  
Old 07-22-2014, 03:26 PM
Traildust's Avatar
Traildust Traildust is offline
Freshman User
 
Join Date: Feb 2004
Location: Fallon, NV
Posts: 48
Traildust is starting off with a positive reputation.
Off the bowl pre filter. I would go with a regulated return but I am really thinking of getting rid of this truck it's starting to show it's age.
Bill
__________________
2002 F350 CC, LB, 4X4, 7.3, 6 Speed. Billet Compresor Wheel. Ford AIS Filter. PHP Hydra. Towing 2013 Arctic Fox 27-5L 5th. Wheel.
Reply With Quote
  #10  
Old 07-22-2014, 04:19 PM
white Buffalo's Avatar
white Buffalo white Buffalo is offline
Postmaster
 
Join Date: Sep 2006
Location: Sioux Falls, SD
Posts: 4,517
white Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to behold
Well, here is my guess......

It all started after you replaced the fuel filter. If it's not the filter then it might be that the filter & cap is not pushing the spring & valve down enough in the Fuel Filter Check Valve Assembly (center of fuel bowl). If the valve is not fully open (you can see the valve has the window closed in the lower pic - the top part of the stem) it will restrict fuel flow. In the top pic you can see the window is open, allowing fuel to pass. This little gizmo is the manufacturers way of ensuring that you use a filter - no filter = no fuel flow. Since the fuel filter change was when the problem happened I would look here first. Just my opinion....

There are some pics of the Fuel Filter Check Valve Assembly on guzzles website (right before & after the reassembly: headline), and you can order anything you need from him as well. Here is the link:

Welcome to guzzle's Powerstroke Fuel Bowl Rebuild Web Page

Click the image to open in full size.

Click the image to open in full size.
__________________
Rich
2003 F-250 - Faubion trns, Wildman tunes, van turbo WW, DI Intercooler, intank/prepump, Swamps 175/146 SS, reg ret, Firestone air bags, Powerslot rotors & Hawk pads, 350 HP/692 TQ
2000 Excursion- Wildman Tunes/Hydra, 160/80 SS Injectors, S366 Turbo,Studs & Springs, Reg Return, DI Intercooler,T500, PMT1 PCM, CT Suspension, Rockin "S" Built
Reply With Quote
  #11  
Old 07-22-2014, 05:15 PM
Traildust's Avatar
Traildust Traildust is offline
Freshman User
 
Join Date: Feb 2004
Location: Fallon, NV
Posts: 48
Traildust is starting off with a positive reputation.
Funny you should mention this because back in JuneI had a question about this very thing. http://www.ford-trucks.com/forums/13...eck-valve.html Maybe that spring needs to be looked at.
Bill
__________________
2002 F350 CC, LB, 4X4, 7.3, 6 Speed. Billet Compresor Wheel. Ford AIS Filter. PHP Hydra. Towing 2013 Arctic Fox 27-5L 5th. Wheel.
Reply With Quote
  #12  
Old 07-22-2014, 08:30 PM
white Buffalo's Avatar
white Buffalo white Buffalo is offline
Postmaster
 
Join Date: Sep 2006
Location: Sioux Falls, SD
Posts: 4,517
white Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to beholdwhite Buffalo is a splendid one to behold
I gutted the fuel valve assembly on one of our vehicles. I don't know if it was the cause or one of the fittings in the head - but my fuel press gauge used to bounce around a bit.
Reply With Quote
  #13  
Old 07-25-2014, 08:20 AM
kirkharrod's Avatar
kirkharrod kirkharrod is offline
Elder User
 
Join Date: Aug 2008
Location: Frankfort, KY
Posts: 508
kirkharrod has a good reputation on FTE.kirkharrod has a good reputation on FTE.
Aftermarket fuel pressure gauges are not very accurate. A high quality mechanic's oil pressure gauge may give you a truer reading. The pressure senders go bad on the aftermarket gauges.
__________________
2002 F-250 Super Cab, 300,000 miles!!!, 100,000 on WVO; Greasecar conversion, 20 plate heat exchanger, AIH delete-water injection in its place, DIY stock fuel bowl delete, 6637 air filter w/ Pete's cover, Straight Piped, GPR LED mod, CAT ELC, 203* thermostat, Bosch auxiliary coolant pump, ext coolant filter, fumoto oil drain valve, Aeroforce Interceptor scan gauge, ISSPro trans temp, boost, EGT, elec fuel pressure gauges, Cyberdyne coolant, veg oil, ambient air temp gauges, 80W low beams/100W high beams.
Reply With Quote
Old 07-25-2014, 08:20 AM
 
 
 
Reply

Go Back   Ford Truck Enthusiasts Forums > Diesel > 1999 - 2003 7.3L Power Stroke Diesel

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ranger 3.0 fuel pressure problem. Need help please. Bsnith Ranger & B-Series 15 06-16-2013 12:08 AM
low fuel pressure rdunagan 6.0L Power Stroke Diesel 38 05-16-2011 02:27 PM
low fuel pressure?!? jwheatley20 6.0L Power Stroke Diesel 13 12-22-2010 09:19 PM
Bosch 044 Fuel Pump is NOT Supporting my B Codes jtharvey 1999 - 2003 7.3L Power Stroke Diesel 96 07-07-2008 10:21 PM
Bronco Engine problem- HELP! illuzion 1978 - 1996 Big Bronco 27 09-24-2005 07:32 AM



All times are GMT -5. The time now is 09:23 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup