horrible mpgs - Ford Powerstroke Diesel Forum
6.4L Problems Forum Having Trouble? Post here

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 43 Old 01-20-2009, 06:41 PM Thread Starter
Powerstroke.org Rookie
 
Join Date: Jan 2009
Location: taylorsville UT
Posts: 27
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
horrible mpgs

so here's the deal I've got an 08 6.4l f-250 fx4 3.73 rear and i can't get better than 10.4 mpg empty on the highway, 9 in the city and 6.5 towing. I use my truck for everyday driving but on the weekend i tow about a 11,000lb trailer. the truck has around 17,000 miles and mpgs haven't really changed since it was new. I keep my foot out of it so i don't know what the deal is. i took the truck to the dealer a few weeks ago and they reflashed with the latest update but since then mpgs have gone down. the truck doesn't regen but about once a tank which i was told is normal. i have an afe stage 2 intake. i'm running out of options and i'm looking for the best mpg's. any help would be great sorry for the long post. thanks for any help
7.3l-2-6.4l is offline  
post #2 of 43 Old 01-20-2009, 06:44 PM
scuffs *****

 
Tyler's Avatar
 
Join Date: Aug 2008
Location: Oakwood, OH
Posts: 5,270
Thanks: 0
Thanked 10 Times in 3 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Send a message via AIM to Tyler
The reason your MPGs are bad is because its a 6.4L

Sr. Engineering Tech/OPS Technician @ Your local cable company.
1997 7.3L PSD
| 4" MBRP Exhaust | S&B CAI | Torque Converter Lock-Up Switch | Exhaust Brake | FPR Shim |DB High Torque Starter | 188,000 Miles | Xtreme Daily Tune | SOLD

2014 Ford Fusion SE
| 1.6 EcoBoost | 6-Speed Manual | The basics and some goodies |
Tyler is offline  
post #3 of 43 Old 01-20-2009, 06:46 PM
Compression Ignition Addict
 
younggun55's Avatar
 
Join Date: Nov 2008
Location: Texas
Posts: 641
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Send a message via AIM to younggun55
spartan tunes and get rid of the dpf

2008 F-250 Spartan 310 Tune
SS 4" Flo-Pro downpipe back
S&B CAI
younggun55 is offline  
post #4 of 43 Old 01-20-2009, 06:47 PM Thread Starter
Powerstroke.org Rookie
 
Join Date: Jan 2009
Location: taylorsville UT
Posts: 27
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
something helpfull was more of what i was going for in the replys. i owned a 7.3 before i bought the 6.4 so i already know that part of it.
7.3l-2-6.4l is offline  
post #5 of 43 Old 01-20-2009, 06:50 PM Thread Starter
Powerstroke.org Rookie
 
Join Date: Jan 2009
Location: taylorsville UT
Posts: 27
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
is there a way to do the spartan tunes with dpf delete without completely screwing my waranty??? and the guys that i'm hearing from are doing better than me before programming their trucks.
7.3l-2-6.4l is offline  
post #6 of 43 Old 01-20-2009, 06:54 PM
Compression Ignition Addict
 
younggun55's Avatar
 
Join Date: Nov 2008
Location: Texas
Posts: 641
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Send a message via AIM to younggun55
if your dealer finds out ya they will void your warranty but just put everything back on and load your stock program on and the spartan tunes are suppose to be untraceable....I know other guys on here have received warranty work after doing it....what the dealer doesnt know wont hurt them....I was getting 8.5 stock and now getting about 15 with the 275 tune so it was a good jump for me.

2008 F-250 Spartan 310 Tune
SS 4" Flo-Pro downpipe back
S&B CAI
younggun55 is offline  
post #7 of 43 Old 01-20-2009, 06:54 PM
Compression Ignition Addict
 
dieselmac99's Avatar
 
Join Date: Jul 2008
Location: Lunenburg, MA
Posts: 356
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
should've gotten a CTD (please hold the floggings) I LOVE PSD's but you can get a CTD 6speed with 3.42's in the rear. I am a loyal ford guy and will never own anything but (probably). Just saw the 3.42 on the dodge site, and thought it was cool. Have you gotten any reflashes? And no, there's not really a way to dodge (no pun intended) the warranty with the Spartan and DPF delete. Good luck.

2000 F250 7.3 ZF6 4x4 EC/LB 5" TBE
2003 Chevrolet LB7 Allison 1000 4"TB
2004 F450 6.0 5R110 9' MM2
2004 F350 6.8 5R110 8' MM2
dieselmac99 is offline  
post #8 of 43 Old 01-20-2009, 07:39 PM
Compression Ignition Addict
 
Dusten's Avatar
 
Join Date: Mar 2008
Location: Lake Goodwin, Wa
Posts: 1,903
Thanks: 14
Thanked 19 Times in 19 Posts
Mentioned: 0 Post(s)
Quoted: 170 Post(s)
Garage
Feedback Score: 0 reviews
Quote:
Originally Posted by 97StrokerG View Post
The reason your MPGs are bad is because its a 6.4L
thanks for your helpful replies... go back to the 7.3L forums. I'd bet that with a tuner and dpf delete the 7.3 would be wishing to have our mileage. And its not because its a 6.4L, i see right at 14 highway and 11 city, and that is with 37's

2008 Ford F-250 - 6"-37s-H&S-deleted
2001 Ford Lightning - Built motor - Built trans - 2.3 KB - Custom Interior - Garage Queen
1993 Ford Lightning - stockish
1994 Ford Cobra - stockish
1968 Mustang - Gold Nugget Special - restored
2015 Chevy Tahoe LTZ
2015 Hyundai Sonota Sport
Dusten is offline  
post #9 of 43 Old 02-18-2009, 05:34 PM
Member
 
PreciseMechanical's Avatar
 
Join Date: May 2008
Location: Porter, Texas
Posts: 31
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Send a message via AIM to PreciseMechanical
I have 2008 F350 C/C 4x4 Longbed - Got 10 to 11 mpg to start. I put Magnaflow 4" all the out with no muffler, and Diablo Sport tuner. I now have 60,000 miles on the truck and I get average 14-15 mpg in town, and 17 to 18 on hwy. I carry around 3000 lbs in the bed, still get 16.5 mpg.

PreciseMechanical is offline  
post #10 of 43 Old 02-18-2009, 05:38 PM
Serving Our Country!
 
smitty16s's Avatar
 
Join Date: Mar 2008
Location: Little Rock Air Force Base,Arkansas and North Augusta,South Carolina
Posts: 1,744
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by Dusten View Post
thanks for your helpful replies... go back to the 7.3L forums. I'd bet that with a tuner and dpf delete the 7.3 would be wishing to have our mileage. And its not because its a 6.4L, i see right at 14 highway and 11 city, and that is with 37's
i just went on a trip from little rock to augusta,ga. and i averaged 22.9 mpg, i agree his reply was useless, but dont disrespect our trucks either.


1999 F-250 Supercab 6spd 2WD
Custom tunes by Tony Wildman,
AFE stage 2 Intake, ZooDad Mod, 2 Guages, Grand Rock 5" Aussie Stacks, Train Horn Qssb Quick Spool WOP, ITP regulated Return, Boost Regulator, Pioneer avic d3 Coming Soon: Injectors,short throw shifter, southbend clutch
smitty16s 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