6.0 decrease in mpg's - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old 09-22-2011, 12:25 AM Thread Starter
PSN Local
 
Join Date: Sep 2010
Location: Abita Springs, La
Posts: 78
6.0 decrease in mpg's

Hey everybody,

I'm having some issues that I'm not too sure about. I have a 2003 F350 4x4 with the 6.0. I have been monitoring my ScanGuageII and my fuel economy has dropped almost half within the last 2 wks. I'm gonna change my fuel filters out tomorrow and install the newer fuel pressure spring and put the 6.4 fuel rail bolts in. I know that some of this is not going to increase my mpg's, but it is something that I have been wanting to do. I checked my air filter, front hubs to make sure they are not locked, and tire pressure. Nothing is out of the ordinary. Just wondering if anybody else has any suggestions? Oh i'm averaging about 7.6 mpg's and I was getting 13 mpg's around town.
BBowden73 is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 09-22-2011, 08:44 PM Thread Starter
PSN Local
 
Join Date: Sep 2010
Location: Abita Springs, La
Posts: 78
Re: 6.0 decrease in mpg's

Well I'm glad to see all the replies! Anyway I changed everything that I said and the ole Autoscan II is still reading about the same MPG's. Anyway I did notice that my oil level was way low. Down about 3 to 4 qts. I just changed the oil about 2500 miles ago, but this has never happened before. No evidence of leaks on the outside of the engine. I did have some oil pooling on the inside of the intercooler tube boots. On the intake side and the turbo side. Well if anyone has any suggestions leave some feedback. I would greatly appreciate it.
BBowden73 is offline  
post #3 of 7 (permalink) Old 09-22-2011, 10:27 PM
MPG Moderator
 
Dave Whitmer's Avatar
 
Join Date: Jul 2007
Posts: 1,076
Re: 6.0 decrease in mpg's

Check your brakes. You might have one or more dragging.

Reboot the ECM

If it were low oil it would really ratty if at all.

2000 F-350 SC 4x2 6 speed
3.08 gears Gear Vendor Overdrive
Slammed 4"
Rugged Air Dam
315,000 miles
Dave Whitmer is offline  
 
post #4 of 7 (permalink) Old 09-22-2011, 11:08 PM Thread Starter
PSN Local
 
Join Date: Sep 2010
Location: Abita Springs, La
Posts: 78
Re: 6.0 decrease in mpg's

Not the brakes I just changed all four rotors and pads recently. And I just recently replaced the batteries, but i guess I could try and reboot the ecm again. And just for more information the FICM voltage is 48.7vdc with no drop.
BBowden73 is offline  
post #5 of 7 (permalink) Old 09-23-2011, 02:40 PM
PSN Local
 
SD26's Avatar
 
Join Date: Jul 2008
Posts: 205
Re: 6.0 decrease in mpg's

Quote:
Originally Posted by BBowden73 View Post
Not the brakes I just changed all four rotors and pads recently.
Just a thought following Dave's brake thoughts...

Did you remove fluid from the reservoir to account for the extra thickness of the new pads?

Dave
2005 E350 6.0PSD
2003 Excursion Limited 4WD 7.3PSD - Sold
1996 E350SD dually 7.3PSD - Gone!

2002 VW Jetta TDI - stock
2007 Escape Hybrid
1999 Kaw KLR650 - 17/42 gearing
SD26 is offline  
post #6 of 7 (permalink) Old 09-24-2011, 03:34 AM
Diffrent Strokes
 
orrwhat's Avatar
 
Join Date: Jun 2010
Location: Lubbock,TX
Posts: 350
Re: 6.0 decrease in mpg's

You may have a boost leak one the exhaust side or charge side.

2006 F-250 CC SB 4X4, all stock with egr system for now.
orrwhat is offline  
post #7 of 7 (permalink) Old 09-24-2011, 01:53 PM Thread Starter
PSN Local
 
Join Date: Sep 2010
Location: Abita Springs, La
Posts: 78
Re: 6.0 decrease in mpg's

Yep i removed fluid to account for the new brake pads. As for the exhaust leak i have looked all around the y-pipe as best as I can. I don't see any soot or evidence of a leak, but I could be missing something. The only odd thing that I have noticed is when I was checking the FICM voltage it sounded as though air was escaping from the fuel filter up in the engine compartment. It continued to hiss until the fuel pump shutoff. Never noticed this before, but then again I've never been in the engine compartment during the cycle either. So i don't know if this is normal or not. Anybody know?
BBowden73 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the PowerStrokeNation : 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










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