TERRIBLE FUEL MILEAGE - 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 04-20-2011, 09:29 PM
Compression Ignition Addict
 

Join Date: Mar 2011
Posts: 390
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 1 reviews
TERRIBLE FUEL MILEAGE

My 05 6.0 has a MBRP exhaust and street tune from innovative. No code, 48 volts @ FICM, runs awesome.

I average 8mpg city on straight fuel and around 10mpg with diesel kleen+cetane booster. That is with a light foot and seeing WOT for a few seconds once a day.

What in gods name could be causing this? I bought the truck expecting to be getting 13 city all day.


wanted to add:

fresh rotella 10w-40 every 5k, fresh fuel filters every 15k

SCT says my coolant temp is around 186 once warmed up fully. I heard the thermostat doesnt open until 190+???

Last edited by ckyguy68; 04-20-2011 at 09:36 PM.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 04-21-2011, 04:23 AM
Compression Ignition Addict
 

Join Date: Jun 2009
Posts: 652
Thanks: 0
Thanked 2 Times in 1 Post
Feedback Score: 0 reviews
you coolant temp is good, normal running is around 188F when it gets hot out or you start working does it climb up over 190 but not by much usually
Reply With Quote Quick reply to this message
  #3  
Old 04-21-2011, 08:29 AM
Compression Ignition Addict
 

Join Date: Dec 2009
Posts: 914
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I have the same truck but stock tune and I just filled up this morning. I avg 14.7 on my last fill up. I drive 70/30 highway/city. Besides the tune the only thing I am doing different is I'm adding about 28-30 oz of 2 cycle oil at ever fill up. I run that and then will do DK about once a month. Seems to work well for my truck. I would also change your fuel filters at 10K but that's just me.
Reply With Quote Quick reply to this message
  #4  
Old 04-21-2011, 08:33 AM
NOT a Democrat
 

Join Date: Oct 2009
Location: Robinson Twp PA (Pittsburgh)
Posts: 4,511
Thanks: 2
Thanked 3 Times in 3 Posts
Feedback Score: 0 reviews
Send a message via AIM to Galaxie
Where do you live? The fuel maybe? The witner mix up north sucks.
Reply With Quote Quick reply to this message
  #5  
Old 04-21-2011, 08:49 AM
Compression Ignition Addict
 

Join Date: Mar 2011
Posts: 390
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 1 reviews
I live in Michigan, and my gas station buddy said we are still on winter fuel.

Thought i would also add that my truck has 76,000 miles on it and I do also run 2 stroke oil. Saw negligible gains in MPG but it really quiets the truck down.
Reply With Quote Quick reply to this message
  #6  
Old 04-21-2011, 09:13 AM
Compression Ignition Addict
 

Join Date: Aug 2007
Location: New Brunswick, Canada
Posts: 774
Thanks: 1
Thanked 2 Times in 2 Posts
Feedback Score: 0 reviews
I get 14MPG towing a 15K RV, The truck fan speed is also calibrated at 195F, And the turbo pressure is at 10PSI. I found out that the fan will calibrate temperature at 190F when programed stock and if the thermostat does not alow the water temperature to hit 190F you are running the truck with a closed turbo and fuel enriched to heat up the engine to 190F.
You will never know where your fuel lost is unless you have the Scangauge to indicate the bad fuel mileage.
I read many Forums and every problem I see can be found an resolved with a running gauge that will tell FIMC volt, EOT, Instaneous MPG, Fan Speed, digital Coolant temperature.
So A gauge at $160 would surely pay for itself in a little time as it did with mine.
Reply With Quote Quick reply to this message
  #7  
Old 04-21-2011, 09:39 AM
Compression Ignition Addict
 

Join Date: Mar 2011
Posts: 390
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 1 reviews
Quote:
Originally Posted by caissiel View Post
I get 14MPG towing a 15K RV, The truck fan speed is also calibrated at 195F, And the turbo pressure is at 10PSI. I found out that the fan will calibrate temperature at 190F when programed stock and if the thermostat does not alow the water temperature to hit 190F you are running the truck with a closed turbo and fuel enriched to heat up the engine to 190F.
You will never know where your fuel lost is unless you have the Scangauge to indicate the bad fuel mileage.
I read many Forums and every problem I see can be found an resolved with a running gauge that will tell FIMC volt, EOT, Instaneous MPG, Fan Speed, digital Coolant temperature.
So A gauge at $160 would surely pay for itself in a little time as it did with mine.

Very interesting. I have access to a Ford VCM/IDS so i will take a look at all those PIDs.

With a custom tune from eric can i still use the sct to change when my fan comes on? I've never really heard it come on but just to be sure maybe I can bump it up to 200.

I noticed a couple weeks ago when we had a 85 degree day (thats michigan for ya) it seemed to run better and wasnt drinking as much fuel.
Reply With Quote Quick reply to this message
  #8  
Old 04-21-2011, 11:35 AM
N.S.D.Q.

 

Join Date: Oct 2007
Location: Middle VA
Posts: 3,975
Thanks: 9
Thanked 42 Times in 33 Posts
Feedback Score: 3 reviews
Have you had the PCM and FICM reflashed? Are you the original owner?
Reply With Quote Quick reply to this message
  #9  
Old 04-21-2011, 11:56 AM
Compression Ignition Addict
 

Join Date: Mar 2011
Posts: 390
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 1 reviews
Quote:
Originally Posted by HeavyAssault View Post
Have you had the PCM and FICM reflashed? Are you the original owner?
My vehicle strategy is VXCF7N3. It was flashed to the most recent ones in 2009 i believe. I am the third owner and have reviewed the Oasis reports and the previous owner has receipts for all the maintenance items. He took very good care of it but said he never paid attention to mileage.
Reply With Quote Quick reply to this message
  #10  
Old 04-21-2011, 12:06 PM
N.S.D.Q.

 

Join Date: Oct 2007
Location: Middle VA
Posts: 3,975
Thanks: 9
Thanked 42 Times in 33 Posts
Feedback Score: 3 reviews
I'd call Power Hungry Performance asking about that strategy. They can do roll backs on the PCM and FICM. I'm running VXCF4M3 and PHP FICM tuning with great results for mileage. My winter time stats are usually 14mpg +/- mixed driving and climbs into the 16's mixed in the summer. Your reported 8-10 is WAY below normal I'd expect 12 where you live. OAT does play a big part in overall MPG numbers.
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:
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 01:27 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