Another MPG question (Sudden drop) - Ford Powerstroke Diesel Forum
6.4L Performance Parts Discussion What has or has not worked for you?

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 03-02-2011, 06:22 PM
Powerstroke.org Rookie
 

Join Date: Jan 2009
Posts: 25
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Another MPG question (Sudden drop)

I have an 08 F250 4x4 with an SCT tuner and DPF delete. I had been getting decent mileage since installing the tuner and now the mileage has dropped significantly. (17mpg city 22-24mpg highway now dropped to 11mpg city 15 mpg hwy). The truck seems to be running fine, but I can't figure out what has caused the sudden drop. Any help would be appreciated.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 03-02-2011, 06:28 PM
Compression Ignition Addict
 

Join Date: Jul 2007
Location: North Beach Md
Posts: 1,423
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Heavier right foot, winter fuel???? Just a guess or two.
Reply With Quote Quick reply to this message
  #3  
Old 03-02-2011, 06:33 PM
Powerstroke.org Rookie
 

Join Date: Jan 2009
Posts: 25
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I have watched my driving, and have been conservative driving around, with no improvement. As for winter fuel, I am not sure, I am in Tennessee, so I don't know if they are shipping winter fuel down here or not. Is it normal to see a big drop like this over the fuel? I have not heard any of my friends complain about their economy dropping this much.
Reply With Quote Quick reply to this message
  #4  
Old 03-02-2011, 06:33 PM
Compression Ignition Addict
 

Join Date: Sep 2009
Location: nordern mn
Posts: 177
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
stuck caliper, lots of idle time, low tire pressure, wheel bearing, bad tc, stuck injector, etc etc
Reply With Quote Quick reply to this message
  #5  
Old 03-02-2011, 06:34 PM
RJD RJD is offline
Powerstroke.org Rookie
 

Join Date: Sep 2010
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
did you check tire pressures?
Reply With Quote Quick reply to this message
  #6  
Old 03-02-2011, 06:42 PM
Powerstroke.org Rookie
 

Join Date: Jan 2009
Posts: 25
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Just put new brakes on yesterday and all seemed fine, just needed pads. I would think that if a turbo was bad I would notice a loss of performance. I have not checked the tire pressure, but will do that. It will stink if something that simple has slipped by me.
Reply With Quote Quick reply to this message
  #7  
Old 03-03-2011, 09:32 AM
Compression Ignition Addict
 

Join Date: Sep 2009
Location: Tennessee
Posts: 305
Thanks: 1
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Sounds like it calibrated itself. Those numbers sound more like real mileages than the 17mpg city.
Reply With Quote Quick reply to this message
  #8  
Old 03-03-2011, 10:56 AM
<<< 6.4 Powersmoke
 

Join Date: Oct 2007
Location: Pocat-hell-hole, Idaho
Posts: 1,509
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by Barry Smith View Post
Sounds like it calibrated itself. Those numbers sound more like real mileages than the 17mpg city.
I agree. 22-24 MPG is a crazy number, and fairly unrealistic. 17-20 MPG maybe.
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 09:05 PM.


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