Fuel pressure drop at WOT after 60mph - Ford Powerstroke Diesel Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 17 Old 05-07-2013, 03:18 AM Thread Starter
Powerstroke.org Fanatic
 
mxrider777's Avatar
 
Join Date: Aug 2010
Posts: 93
Thanks: 11
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Fuel pressure drop at WOT after 60mph

Just replaced my HFCM (fuel pump) on my 2003 6.0 cause i thought it would fix my fuel pressure dropping after 60 mph, My fuel pressure fluctuates at idle between 63-66 and after WOT from a stop drops to 55 then after 50-60mph(still WOT) starts dropping past 50psi,Any suggestions? I have the blue spring with a bb

2003 F250 CCSB 6.0l
12' lift
43" Michelin xls
sinister coolant filter
zerex elc coolant
edge insight
Egr Delete w/ coolant reroute
mxrider777 is offline  
post #2 of 17 Old 05-07-2013, 03:51 AM
Powerstroke.org Sponsor

 
Corey@CNCFAB's Avatar
 
Join Date: Apr 2010
Location: Defiance, OH
Posts: 9,836
Thanks: 811
Thanked 549 Times in 503 Posts
Mentioned: 225 Post(s)
Quoted: 546 Post(s)
Feedback Score: 1 reviews
Fuel filter???

Sent from AutoGuide.com Free App

E99CCLB 450/400s,STG1cam, KC38R, 4" exh,CNC FAB fuel&oil lines,140vIDM,BTS,S&B

97 ECLB F250 4x4 stock
96 CCLB F350 4x4 stock



EDGE,S&B,SCT,PHP Hydra,TS-Perf,OEM parts,Sam Wyse trans,VB's,LED's,MBRP,ISSPRO,ICON,FOX,KC TURBOs,SD 7.3 fuel kits, HPOP lines

www.cncfab.us or email sales@cncfab.us

Corey@CNCFAB is offline  
post #3 of 17 Old 05-07-2013, 04:53 AM
Compression Ignition Addict
 
Join Date: Feb 2012
Location: Raleigh/Johnston County NC
Posts: 492
Thanks: 6
Thanked 6 Times in 6 Posts
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Feedback Score: 0 reviews
^ +1, I noticed a substantial power increase with good filters. But if you are running oversize injectors that are not listed you need a bigger fuel system. Also try a regulated return if the filters are good.

Sent from AutoGuide.com Free App

Troy K.

2003 Ford F-250 6.slow w/240K
4" Turbo back exhaust
SCT X4
XDP coolant filter
Blue Spring
315/75 BFG MT's on American Racing rims
Leveled
5100's
And way more time and money invested than its worth
Turk.919 is offline  
post #4 of 17 Old 05-07-2013, 05:25 AM Thread Starter
Powerstroke.org Fanatic
 
mxrider777's Avatar
 
Join Date: Aug 2010
Posts: 93
Thanks: 11
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
i Juts changed my fuel filters about 1000 miles ago and stock injectors, and no tune, thats why im confused?

2003 F250 CCSB 6.0l
12' lift
43" Michelin xls
sinister coolant filter
zerex elc coolant
edge insight
Egr Delete w/ coolant reroute
mxrider777 is offline  
post #5 of 17 Old 05-07-2013, 05:30 AM Thread Starter
Powerstroke.org Fanatic
 
mxrider777's Avatar
 
Join Date: Aug 2010
Posts: 93
Thanks: 11
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Filters are motorcraft

2003 F250 CCSB 6.0l
12' lift
43" Michelin xls
sinister coolant filter
zerex elc coolant
edge insight
Egr Delete w/ coolant reroute
mxrider777 is offline  
post #6 of 17 Old 05-07-2013, 11:17 AM Thread Starter
Powerstroke.org Fanatic
 
mxrider777's Avatar
 
Join Date: Aug 2010
Posts: 93
Thanks: 11
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Another note: the fuel pressure gauge reads 0 when i turn the key on and i wait for it to build pressure (66 psi) every time before i start it, so it seems like it wont hold any pressure when sitting for 5 minutes (off) , I dont know if this is normal but i dont think it should be

2003 F250 CCSB 6.0l
12' lift
43" Michelin xls
sinister coolant filter
zerex elc coolant
edge insight
Egr Delete w/ coolant reroute
mxrider777 is offline  
post #7 of 17 Old 05-07-2013, 08:36 PM
Compression Ignition Addict
 
Join Date: Dec 2008
Location: port arthur texas
Posts: 4,222
Thanks: 1
Thanked 62 Times in 58 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Exactly how are you readinge fuel pressure a aftermarket gauge of some kind.
No 6.0 ever built came with a fuel pressure gauge.

Fuel pressure bleeding of after a few minutes is normal, it is why the fuel pump comes on when you turn on the key and why your owners manual says to wait a few minutes before starting the truck that and a few other things to complete their cycles.


Lord I shall lead them to the water but I will not try to make them drink
dannyboy950 is offline  
post #8 of 17 Old 05-08-2013, 04:10 AM Thread Starter
Powerstroke.org Fanatic
 
mxrider777's Avatar
 
Join Date: Aug 2010
Posts: 93
Thanks: 11
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I am using this gauge
square fuel pressure Gauge, velcro anywhere, size of a keychain remote. Digital fuel pressure gauges in a square package will read fuel pressure in PSI. - square fuel pressure Gauge, velcro anywhere, size of a keychain remote
I know another forum member is using this same one

I agree with you, but after the pump shuts off it doesnt hold any pressure it drops to zero very fast, the pump is also louder then normal (motorcraft)

I just think it should hold some amount of pressure and with a new pump i would of expected my fuel pressure to be higher then it was and its the same 66 at idle and 57 at WOT

2003 F250 CCSB 6.0l
12' lift
43" Michelin xls
sinister coolant filter
zerex elc coolant
edge insight
Egr Delete w/ coolant reroute
mxrider777 is offline  
post #9 of 17 Old 05-08-2013, 08:56 PM
Premium Member
 
mhatlen's Avatar
 
Join Date: Sep 2012
Location: Central Valley, Sierra Mountains, California
Posts: 2,627
Thanks: 41
Thanked 137 Times in 126 Posts
Mentioned: 13 Post(s)
Quoted: 295 Post(s)
Feedback Score: 0 reviews
Does the 2003 fuel tank have the filter set up in it?? Also 57 psi at wot is good pressure.
Did you look at the condition of the fuel poppet in the regulator. may have some damage in the seat ?
Again the pressures you are seeing are not really bad, but you are squashing the blue spring.
Does the fuel pressure drop the longer you drive it? If so look into the tank filters if so equipped.


2006 F250 LARIAT CCSB 4X4
ARP Studs, O-Ringed Heads
X4 PHP 65 HP Custom Tow Tune
Atlas40 or Atlas80 Ficm Tune
CAT EC-1 Coolant, IPR Coolant filter
BPD Waterpump, BPD way of thinking
Fass-125 to a Adjustable Pressure Reg.
Turbo-back SS 4" pipe, Corsa Muffler -7" Tip
6.4 starter, DC Power 270 amp alt
Die Hard Platinum AGM all 2/0 Cables
Fabtech Radius Arms
7" lift w: Icon Progressive Coil Springs
2008 up Carli/Deaver rear springs
All riding on some Fatty-Daddy 38/15.50/18 Toyo's
mhatlen is online now  
post #10 of 17 Old 05-09-2013, 06:52 AM
Compression Ignition Addict
 
Join Date: Jun 2011
Location: Colorado Springs
Posts: 419
Thanks: 1
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
On mine, once the fuel pump shuts off the pressure bleeds down to zero pretty quickly. I think it is normal.

MikeB

2005 F-250 6.0L, crew cab, long bed 4x4
completed in 2011: STC update, new IPR, BPD EGR cooler, oil cooler rebuild, 6.4 banjo bolts, blue spring update, SCT X3, Insight CTS, 58V FICM, CCV Mod, DIY coolant filter (now gone), refinished turbo
2012: ARP headstuds, OEM gaskets, standpipes and dummy plugs
2015: XDP coolant filter
PSDMikeB 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