Horrible fuel mileage - Ford Powerstroke Diesel Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 22 Old 07-12-2012, 04:35 PM Thread Starter
Compression Ignition Addict
 
Daxman's Avatar
 
Join Date: May 2011
Location: Pensacola, Florida
Posts: 354
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
Horrible fuel mileage

Does anyone know what would cause my fuel mileage to drop by about 3 MPG. The last 3 weeks i have been driving really easy so i can save some money and it seems like its backfired. Im getting around 8 miles per gallon now. The ford dealer installed a brand new ficm so i dont think thats the problem. It doesnt make any sense. Checked the air filter and it seems to be clean so if anyone knows what could cause this, please let me know.
Daxman is offline  
Sponsored Links
Advertisement
 
post #2 of 22 Old 07-12-2012, 04:39 PM
Compression Ignition Addict
 
saltlake3fitty's Avatar
 
Join Date: May 2011
Location: Salt Lake City
Posts: 448
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
6.0s dont like to be driven "easy", that could be your problem, do you have any boost leaks?

00' f350 7.3 8" lift 37x13.5x20 toyo mt, xd wheels, 16 chrome shocks all around, air ride, quad pillar gauge, ghost flame paint, PHP chip
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
, DIY Intake, Zoodad mod, foil delete, recon smoked cab lights, recon smoked led third brake light, wicked wheel, nc hornet's ccv mod, riffraff boots, HPX, 4" turbo back 8" miter stack.
saltlake3fitty is offline  
post #3 of 22 Old 07-12-2012, 04:55 PM
Compression Ignition Addict
 
Join Date: Jul 2011
Location: springfield,il
Posts: 239
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 1 reviews
what is your maintenance like. fuel filter, oil change,etc. how does the truck drive performance wise? does it pull like it should or does it feel slow.
everything like to be driven easy just make sure you open it up once in a while to keep the turbo vains free.
mike

05 ccsb king ranch. 4" turbo back,egr delete, studs, ccv, 58v ficm tuned by eric, little extra fuel pressure, livewire tuned by vivian, mtw stage 1, 175/75s, afe cold air. hid's,led's recon led lights 5% tint80% windshield tint, high idle mod,fog/bright mod, train horns, 4" lift on 20x10s on 35's
amsoil dealer

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
05 smoker is offline  
post #4 of 22 Old 07-12-2012, 05:09 PM
Powerstroke.org Fanatic
 
MO05SD's Avatar
 
Join Date: Oct 2010
Posts: 102
Thanks: 1
Thanked 8 Times in 6 Posts
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Feedback Score: 0 reviews
Possible answer

Quote:
Originally Posted by Daxman View Post
The ford dealer installed a brand new ficm so i dont think thats the problem. It doesnt make any sense.
Most likely the dealership may have reflashed your ECM/TCM to the latest strategy when they installed the new FICM and never told you about it. This happens all the time from what I have read. This generally causes a loss of 2-5 mpg most people say.

2005 6.0 PSD F-250 SC LB 4X4 Auto

Engine Hi-Idle Mod
AIRAID CAI, zoodad mod,
4" Turbo back exhaust
Coolant Filter & Flushed and changed to CAT ELC
Sinister EGR Cooler Delete
Banjo Bolts
Updated Fuel Pressure Regulator Spring (Blue)
ECM/TCM with VXCF4 Strategy
PHP FICM Programmer-(Economy,Atlas 40,Atlas 80,Hercules)
PHP Gryphon CTS monitoring ECT,EOT,TFT,Boost,FICM Voltage & 5 Custom Tunes
Fumoto valve

(Oil bypass filter system to be added next.)


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MO05SD is offline  
post #5 of 22 Old 07-12-2012, 05:15 PM Thread Starter
Compression Ignition Addict
 
Daxman's Avatar
 
Join Date: May 2011
Location: Pensacola, Florida
Posts: 354
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
The truck drives great, i dont hear any weird noises or anything. As far as maintenace schedule, i change the oil every 5000 miles and the fuel filter every other oil change. I actually have about 10,000 miles on this set of fuel filters but thought that was fine because the truck does run fine. I open it up at least 2 times a week. I also add the ford cetane booster everytime i get fuel. I havent checked for any boost leaks yet. I odnt know, i will fill it up and calculate the mileage again. I know of all the horror stories with these motors so i the maintenace is always done.
Daxman is offline  
post #6 of 22 Old 07-12-2012, 05:17 PM
Compression Ignition Addict
 
Join Date: Mar 2008
Posts: 238
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by MO05SD View Post
Most likely the dealership may have reflashed your ECM/TCM to the latest strategy when they installed the new FICM and never told you about it. This happens all the time from what I have read. This generally causes a loss of 2-5 mpg most people say.
Yep. I lost MPG's and power/torque, but at least the turbo lag got a little longer!!

2006 built 05/05 XLT CC DRW PSD. Captain chairs, sunroof, polished aluminum wheels, 6speed, manual 4x4. 285K miles with 130K problem free miles on new engine.
RatherBNtheWoods is offline  
post #7 of 22 Old 07-12-2012, 05:17 PM Thread Starter
Compression Ignition Addict
 
Daxman's Avatar
 
Join Date: May 2011
Location: Pensacola, Florida
Posts: 354
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
How can i check the ficm update, should i take it back to the dealer and have them flash it again.
Daxman is offline  
post #8 of 22 Old 07-12-2012, 05:42 PM
Powerstroke.org Fanatic
 
MO05SD's Avatar
 
Join Date: Oct 2010
Posts: 102
Thanks: 1
Thanked 8 Times in 6 Posts
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Feedback Score: 0 reviews
If you know anyone in your area with a programmer-EDGE,SCT or others. They can read the strategy you are running. The dealership can tell you also. Don't know what they would charge, but I wouldn't want most dealerships to check mine. Spent to much money going to earlier strategies and wouldn't want to lose them. Truck run 200% better and mileage has gone up 2-3 mpg from when I originally bought it.

Can't say 100% that it is why your mileage has gone down. Just have read a lot of post where trucks have gone to dealership for minor repairs or maintenance and owners say they lost 2-3 mpg. Confronted dealership and they admitted to re-flashing truck while there without owners consent.

Beings they were installing a new FICM. They had to flash it and probably re-flashed ECM/TCM to match with latest flashes.

It's just my .02 as to what may have happened.

2005 6.0 PSD F-250 SC LB 4X4 Auto

Engine Hi-Idle Mod
AIRAID CAI, zoodad mod,
4" Turbo back exhaust
Coolant Filter & Flushed and changed to CAT ELC
Sinister EGR Cooler Delete
Banjo Bolts
Updated Fuel Pressure Regulator Spring (Blue)
ECM/TCM with VXCF4 Strategy
PHP FICM Programmer-(Economy,Atlas 40,Atlas 80,Hercules)
PHP Gryphon CTS monitoring ECT,EOT,TFT,Boost,FICM Voltage & 5 Custom Tunes
Fumoto valve

(Oil bypass filter system to be added next.)


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MO05SD is offline  
post #9 of 22 Old 07-12-2012, 05:45 PM
Compression Ignition Addict
 
legionxxii's Avatar
 
Join Date: Sep 2010
Location: Topeka
Posts: 737
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
If you have a SCT or a friend does hook it up and check what the FICM strategy is if not contact for ask them what strategy they put on the FICM. I would then contact PHP or IDP about having the FICM rolled back to a better strategy bring your MPG back up and more power. Also custom tunes will also help with MPG



EDIT: beat me to it

2006 Ford F250 King Ranch CCSB Stock for now

Sold 2003 Ford F250 Fx4 CCSB 4" Turbo Back Straight Pipe With 6" Tip Egr Delete 6.4 Banjo Bolts Blue Fuel Spring Upgrade Cat ELC Coolant Coolant Filter Edge CTS SCT With IDP Tuning PHP FICM Tuner Zoodad Mod Track Time: 13.747

US ARMY 13F
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
legionxxii is offline  
post #10 of 22 Old 07-12-2012, 06:06 PM Thread Starter
Compression Ignition Addict
 
Daxman's Avatar
 
Join Date: May 2011
Location: Pensacola, Florida
Posts: 354
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
I dont have an SCT and most of my friends with trucks all drive chevy's :,... the SCT tuner is the next thing on my list. I guess i will call the dealer tomorrow to see what exactly they did.
Daxman is offline  
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:
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