11 mpg, and stuck front hubs... help!!! - 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 08-27-2010, 12:48 PM
Powerstroke.org Rookie
 

Join Date: Aug 2010
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
11 mpg, and stuck front hubs... help!!!

my 99 f250 is getting only 11 mpg with new injectors, high presure oil pump, and cronk sensor. i have replaced the exuast from the turbo back and added k&n filters. i have a diablo sport preditor tuner that has three settings 65, 85, and 110 hp. on stock the tires won't break on dirt. on 65 it runs good but the motor surges for a few seconds before settling to a smooth idol, first thing in the morn. the higher i set the tunner the worse it runs. on 110 the injectors clatter like crazy and the truck is sluggish. i love my truck but will have to sell it if i can't get good milege without breaking the bank. (poor boy's got poor ways) lol

then there is the hubs not disengageing. i don't play in my truck but use the 4x4 often wether it be in sand or water. i know that i am loosing mpg there also. when i put it in 4x4 the ac vents change to defrost for a while. i can't really afford new hubs at the moment while recovering from the injector job. is there a way to use the factory auto hubs as manual if i disconnect the vacuum lines to them and do some cleanning as i am sure they need it.

any advice would be great!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 08-27-2010, 01:18 PM
dmd dmd is offline
Compression Ignition Addict
 

Join Date: Oct 2008
Posts: 451
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 1 reviews
Just remove the hoses from the hubs and use the knob to turn them.

What does your turbo look like? Also, if you have the stock air box with a K&N
you will dust that engine if it isnt already.

How did the truck run before the work?
Reply With Quote Quick reply to this message
  #3  
Old 08-27-2010, 01:33 PM
Powerstroke.org Rookie
 

Join Date: Aug 2010
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by dmd View Post
Just remove the hoses from the hubs and use the knob to turn them.

What does your turbo look like? Also, if you have the stock air box with a K&N
you will dust that engine if it isnt already.

How did the truck run before the work?


i'm sorry i don't know how to answer that question about the turbo. it has a metal hose system that runs to a y over the motor and to the cooler in front. the turbo looks old, the exaust side is rusty. how would i know if i have dusted the motor? i don't mean to sound dumb this is my first diesel truck.

when i got it was sluggish and got 16 mpg. i put the tunner on it at 65 and it blew my mind. it had so much power and 22mpg, that was a year and a half ago. the changes were suttle and slow. it wasn't till i took a long road trip about six months ago that i noticed the mpg was horrible then i started noticing a loss in power.
Reply With Quote Quick reply to this message
  #4  
Old 08-27-2010, 01:43 PM
To Many Projects
 

Join Date: Jun 2010
Location: Michigan City, IN
Posts: 3,614
Thanks: 2
Thanked 5 Times in 5 Posts
Feedback Score: 1 reviews
K&N is stock box bad????? that what i got on my 01 ex for three years now and still runs fine.
Reply With Quote Quick reply to this message
  #5  
Old 08-27-2010, 01:48 PM
Almostdunfukinwidit


 

Join Date: Nov 2006
Location: Trempealeau, WI
Posts: 30,984
Thanks: 107
Thanked 89 Times in 83 Posts
Feedback Score: 0 reviews
Send a message via Yahoo to Dave
The hubs not disengaging will cost 2-3mpg.

What you have is a vacuum leak. Most likely at the hubs. Find the leak Fix the leak.

Replace your hubs with Warn Premiums. Problem solved.
Reply With Quote Quick reply to this message
  #6  
Old 08-27-2010, 01:55 PM
Compression Ignition Addict
 

Join Date: Jul 2009
Location: Savannah,Ga
Posts: 2,799
Thanks: 4
Thanked 2 Times in 2 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by Dave View Post
The hubs not disengaging will cost 2-3mpg.

What you have is a vacuum leak. Most likely at the hubs. Find the leak Fix the leak.

Replace your hubs with Warn Premiums. Problem solved.
I found my leak to be at the hubs but I cant find where it is. Is there a seal in there somewhere or what?
Reply With Quote Quick reply to this message
  #7  
Old 09-01-2010, 05:33 PM
Powerstroke.org Rookie
 

Join Date: Oct 2009
Location: Aurora, Colorado
Posts: 27
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
There are several seals in the front hubs. I'm in the process of replacing the seals and bearings in my right front hub right now. I have warn hubs and they work great but the bearing that holds the axel shaft inside the wheel bearing is so worn out that the hub drags and like your situation, wont disengage sometimes. There is one yellow o-ring type seal that goes around the wheel bearing carrier that I believe does most of the vacuum sealing but there are also other seals that may play a part. I also recommend switching to a manual hub as my pops has the stock hubs and is always having trouble with them. Good luck
Reply With Quote Quick reply to this message
  #8  
Old 09-12-2010, 09:07 AM
Powerstroke.org Rookie
 

Join Date: Sep 2010
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
my truck turns on defrost when i engage 4x4 too. Is that what its supposed to do? If not what's wrong?
Reply With Quote Quick reply to this message
  #9  
Old 09-12-2010, 09:10 AM
O.I.F. Combat Vet 11B
 

Join Date: Jul 2009
Location: tallahassee
Posts: 1,047
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 1 reviews
Quote:
Originally Posted by greenearth808 View Post
my truck turns on defrost when i engage 4x4 too. Is that what its supposed to do? If not what's wrong?
vacuum leak
Reply With Quote Quick reply to this message
  #10  
Old 09-13-2010, 11:42 AM
Premium Member
 

Join Date: Jul 2010
Location: Harrisonville, MO
Posts: 176
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Don't you have to back up three revolutions to disengage the auto hubs? It was that way on my F150, but they were straight auto, not auto manual like my '99SD
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 01:14 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