Well... I think I have a Fuel Pressure Problem... - Ford Powerstroke Diesel Forum
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-29-2012, 08:17 PM
Compression Ignition Addict
 

Join Date: Apr 2010
Location: Bucks County PA
Posts: 525
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Well... I think I have a Fuel Pressure Problem...

Ok, so for the past 2/3 months I have kept telling myself that I have a fuel pressure problem, but haven't had any normal symptoms. Until recently has a more defined symptom arose.

Back story/vehicle history.

Truck is tuned and has studs and all the know issues fixed. (FICM replaced, failed injector replaced, regular maintenance done, OEM/Racor filter, Synthetic oil, etc).

Biggest thing done was the Ford Blue Spring. That was replaced when I did my headgaskets/stud back in April 2011. I think i put the Fuel Pressure Gauge on back in January.

Pressures were decent. 65psi idle, 58/55ish WOT (Figured they were a little low due to old fuel filters, at the Jan time frame had about 3k or so before they were due. and from my dealership/tech experience i know as filters age pressures can drop and changing filters can and will fix some driveablity and issues with trucks from time to time. so i figured the lower pressures were due to my filters, and that i had no real issues/symptoms)

Well last weekend replaced the filters, no change in pressures. So at this point I think its just the truck.

I finally had a chance to go WOT 3 nights ago (on a road i know i can go threw the first three gears before i let up)

I was watching the pressures, and noticed my idle was down around 62/63psi. Jump on it 1st and 2nd gear i was down at 50/51psi. Shift into 3rd gear, all of sudden my pressure drop to 30psi. Instantly i let up. coast down in speed. figure maybe a fluke or something.

Next night did the same thing, but this time stayed in throttle longer in 3rd. sure enough dropped and stayed at 30psi. let up to save the injectors.

So tonight i make a 3rd attempt, hoping that i was just seeing things and this time once 3rg gear hit, fuel pressure dropped again, except this time went WAY down, down to 20psi. Let up and coasted and drove easy all the way home.

So now I know i have fuel issue. and I just want to see what the ORG has to say before i begin my diag.

Thanks in advanced,
Jason


Cliff Notes --- properly maintained truck, new fuel filters, shifting to 3 gear under WOT FP drops to and under 30psi, ORG's thoughts
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 04-30-2012, 02:47 AM
Compression Ignition Addict
 

Join Date: Mar 2011
Posts: 220
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
HFCM on its way out?
Reply With Quote Quick reply to this message
  #3  
Old 04-30-2012, 03:29 AM
Compression Ignition Addict
 

Join Date: Apr 2010
Location: Bucks County PA
Posts: 525
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
That's what's I was thinking before the "symptom" showed up. That my HFcm was getting week or I had a fuel pump getting weak
Reply With Quote Quick reply to this message
  #4  
Old 04-30-2012, 03:55 AM
Compression Ignition Addict
 

Join Date: Mar 2011
Posts: 220
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by jrtcbmw View Post
That's what's I was thinking before the "symptom" showed up. That my HFcm was getting week or I had a fuel pump getting weak
That'd be the direction I'd be looking in.
Reply With Quote Quick reply to this message
  #5  
Old 04-30-2012, 04:33 AM
Compression Ignition Addict
 

Join Date: Apr 2010
Location: Bucks County PA
Posts: 525
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by Brieldo View Post
That'd be the direction I'd be looking in.
Thats where im looking at this point. My concern was the fact that it only happens in the 3rd gear shift. Granted i never got above 3rd gear to find out if it happens in upper gears. but the fact that its one gear has me really thinking.

Now the real question is, replace with OEM or Aftermarket upgrade...
Reply With Quote Quick reply to this message
  #6  
Old 04-30-2012, 06:48 AM
Compression Ignition Addict
 

Join Date: Feb 2008
Location: Keller, Texas
Posts: 2,112
Thanks: 0
Thanked 7 Times in 7 Posts
Feedback Score: 2 reviews
hfcm time for fun upgrades
Reply With Quote Quick reply to this message
  #7  
Old 04-30-2012, 07:45 AM
Compression Ignition Addict
 

Join Date: Mar 2007
Posts: 4,556
Thanks: 2
Thanked 1 Time in 1 Post
Feedback Score: 1 reviews
Mine does this, when the trans isn't in limp mode. I had been driving it around without a fuelpsi gauge and it must have been dropping to 20psi often but as soon as I got the gauge I stopped digging on it. Mine was the same, as soon as it got to 3rd while wot from a stop it would plummet to 20psi. fuel pump going in with new trans.
Reply With Quote Quick reply to this message
  #8  
Old 04-30-2012, 07:47 AM
Compression Ignition Addict
 

Join Date: Apr 2010
Location: Bucks County PA
Posts: 525
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Looks like i may be doing the AirDog sooner then i planned...

If i go that route which AirDog do i get and do i need the sump too?
Reply With Quote Quick reply to this message
  #9  
Old 04-30-2012, 07:51 AM
Compression Ignition Addict
 

Join Date: Mar 2007
Posts: 4,556
Thanks: 2
Thanked 1 Time in 1 Post
Feedback Score: 1 reviews
airdog II and yeah I would recommend a sump. reminds me I need to get a sump also. good luck.
Reply With Quote Quick reply to this message
  #10  
Old 04-30-2012, 08:21 AM
Compression Ignition Addict
 

Join Date: Apr 2010
Location: Bucks County PA
Posts: 525
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Thats what i thought about the AirDogII

I just dont know how i feel about the sump though, first off it will take in more dirt in the tank and 2 i dont know how i feel about something hanging below my tank and if it will even fit with the tank skid plate.

Wouldnt the Strickly Diesel fuel pick up kit do the same as the sump? or at least allow for more fuel to be picked up? (http://shop.strictlydiesel.com/store...ig_Tank_Pickup)

Last edited by jrtcbmw; 04-30-2012 at 08:42 AM.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

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
Display Modes

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



All times are GMT -8. The time now is 04:43 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors