MPG Question. - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 4 Old 03-27-2010, 05:22 PM Thread Starter Rookie
Join Date: Sep 2009
Posts: 23
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
MPG Question.

I recently purchased a 2002 F350 Lariat. It has 19K miles on it. The truck had a Bullydog chip in it. 315's for tires. I changed the Air cleaner,Fuel filter and removed the chip. Also downsized the tires to the stock size.

I know that the overhead computers are not always accurate. But, with everything as I bought it, The computer showed an average of 12-13 MPG. After doing the above mentioned things I anticipating that average to climb a bit. Instead it has seemed to drop below 11MPG. I was wondering if changing the fuel filter would cause anything like this. I do smell raw diesel mostly after I run it for a bit. I can't see any sign of leaking. I did spill a little fuel while changing the filter. Any ideas??
bigjake710 is offline  
post #2 of 4 Old 03-27-2010, 05:43 PM
Compression Ignition Addict
Isakson's Avatar
Join Date: Mar 2010
Location: Missouri
Posts: 977
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Well i would look for a diesel leak somewhere, i jsut recently had my water sensor on the fuel canister leak, so i replaced it for 40 dollars. Also it depends on the truck, do u hav an auto tranny, r u treatin ur fuel, how do u run it, etc. My truck is a 5 spd, and i run it a little bit, and with winter fuel and treatment, i get about 13 mpg. Also if u haul anything around or have anything heavy, that will decrease it.

1996 F 350 7.3L 4x4 226,000 Miles on the Clock and Still Tickin!
Edge Evolution: Extreme
Kobalt Tool Box

Isakson is offline  
post #3 of 4 Old 03-27-2010, 05:54 PM
Compression Ignition Addict
BGJ's Avatar
Join Date: Feb 2010
Location: Fruita Co
Posts: 1,510
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Dang Big Jake, way to score that truck. I thought I had the lowest mile o2 truck around. Got any pics?? I dont get the mileage these guys brag about either. If you search it you will find lots of good ideas. I read about the exhaust back pressure tube coroding & filling up with soot, I took mine apart & cleaned it, it had junk in there but wasn't completely blocked. Also read that the fuel filter bowl will leak out the drain tube. They say not to drain it too much or the orings will certainly fail. I put a rubber hose on the metal tube underneath the engine & taped a water bottle to it to see if it was leaking there. Not a drop.
Guys on here know a ton more about the 7.3 than me, sorry.
Here's a pic of my DIY intake:

02 F250 Leveling kit, 295/70/17 Nitto Terra's
39501 miles on the clock

Last edited by BGJ; 03-28-2010 at 05:33 AM.
BGJ is offline  
post #4 of 4 Old 03-27-2010, 09:36 PM
Compression Ignition Addict
lcducote's Avatar
Join Date: Feb 2009
Location: texas/mississippi
Posts: 796
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 4 Post(s)
Feedback Score: 0 reviews
you probably lost those 1 or 2 mpg because you took the chip off... as for better mileage, DIY intake... there are threads on here on how to it in the 7.3 TECH FILES link. open up the exhaust with either larger down-pipe or straight pipe it. most 02's didn't have cats so you don't to worry about that. put your chip back on and you should see anywhere from 3-6 mpg with all those upgrades

2002 F-250 POWERSTROKE 4X4

BANKS 4" Turbo-Back w/ Power Elbow
Converted from 3/4 to 1TON
Napa 6637 DIY Intake
6.0 Trans. Cooler
Dipricol Gauges
Warn Hubs
TW 6 Pos.

And Some Other Boring Stuff

lcducote is offline  

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


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