F150online Forums

1997 - 2003 F-150

Still NOT getting the MPGs I'd hoped for!!!

Thread Tools
 
Search this Thread
 
Old Jan 26, 2011 | 04:46 PM
Share
  #286  
Bansheeman6100's Avatar
Senior Member
Joined: Feb 2007
Posts: 599
Likes: 0
From: Austin, Texas
Originally Posted by Glen R
Sounds promising, but not super accurate. At 64.1 miles a change of .1 gallons is about 3/4 mpg. Keep updating as you gain a few miles.
i know its not completely accurate, but its not that far off. even at a full 1 MPG off they are still crazy good numbers. playing with the tune and trying to find out why the spedo is off
 
Reply
0
Old Feb 3, 2011 | 01:25 PM
Share
  #287  
DirtySCREW's Avatar
Thread Starter
|
Technical Article Contributor
Joined: Sep 2009
Posts: 660
Likes: 0
From: NC
Well guys its looking like I've DROPPED a little over 2 MPG from taking the TB spacer off!!! I've gone from 13.5 or better to 11.5! I'll give it one more tank and if its the same, I'm going to be putting the TB spacer back on (sorry Jbrew!)----------------DirtySCREW
 
Reply
0
Old Feb 3, 2011 | 01:44 PM
Share
  #288  
Longshot270's Avatar
Senior Member
Joined: Apr 2010
Posts: 689
Likes: 0
From: San Marcos, TX
How have the driving conditions changed since you took it off? If you had a recent snow that will drop your mileage because of more resistance. You also will be driving different if there is ice and stuff.
 
Reply
0
Old Feb 3, 2011 | 03:58 PM
Share
  #289  
DirtySCREW's Avatar
Thread Starter
|
Technical Article Contributor
Joined: Sep 2009
Posts: 660
Likes: 0
From: NC
Originally Posted by Longshot270
How have the driving conditions changed since you took it off? If you had a recent snow that will drop your mileage because of more resistance. You also will be driving different if there is ice and stuff.
Not that much. I've had one snow day that I drove the truck around for just a bit....but that was just going the see the houses in the neighborhood and only driving like 35MPH and limited 4X4 use. I can drive on the beach in 4X4 and NOT drop 2 MPGs!!!! I don't know what to do. I guess I'll just have sucky mileage for ever!---DirtySCREW
 
Reply
0
Old Feb 3, 2011 | 07:40 PM
Share
  #290  
TruckGuy24's Avatar
Senior Member
15 Year Member
Liked
Loved
Joined: Jan 2009
Posts: 10,731
Likes: 47
From: Concord, NC
Colder temps... huge factor was well. I've dropped 4-5 mpg's since summer
 
Reply
0
Old Mar 17, 2011 | 09:08 PM
Share
  #291  
pomer's Avatar
Junior Member
Joined: Mar 2011
Posts: 8
Likes: 0
ok here we go i owned since new used to get 16 city 19 highway everything stock with 600 rpm. now i get 11 no matter how i drive hard highway city and rpm 900 now thats food for thought
 
Reply
0
Old Mar 17, 2011 | 09:15 PM
Share
  #292  
jbrew's Avatar
Technical Article Contributor
Joined: Oct 2005
Posts: 25,641
Likes: 19
From: MI
Originally Posted by pomer
ok here we go i owned since new used to get 16 city 19 highway everything stock with 600 rpm. now i get 11 no matter how i drive hard highway city and rpm 900 now thats food for thought
Whats with 600 rpm mean ?
 
Reply
0
Old Mar 17, 2011 | 09:24 PM
Share
  #293  
DirtySCREW's Avatar
Thread Starter
|
Technical Article Contributor
Joined: Sep 2009
Posts: 660
Likes: 0
From: NC
idle RPM's???????????-----------DirtySCREW
 
Reply
0
Old Mar 17, 2011 | 10:41 PM
Share
  #294  
pomer's Avatar
Junior Member
Joined: Mar 2011
Posts: 8
Likes: 0
Originally Posted by pomer
ok here we go i owned since new used to get 16 city 19 highway everything stock with 600 rpm. now i get 11 no matter how i drive hard highway city and rpm 900 now thats food for thought
my bad 600 rpm idle in neutral/park new now it's 900 rpm idle neutral/park
 
Reply
0
Old Mar 18, 2011 | 05:12 AM
Share
  #295  
phil6608's Avatar
Senior Member
Joined: Oct 2005
Posts: 3,579
Likes: 1
From: Wilmington DE
Originally Posted by pomer
my bad 600 rpm idle in neutral/park new now it's 900 rpm idle neutral/park
Are we supposed to guise what kind of truck you have? What motor , how many miles are on it??????

Phil
 
Reply
0
Old Mar 18, 2011 | 05:20 AM
Share
  #296  
stoffer's Avatar
Senior Member
Truck of the Month
20 Year Member
Veteran: Army
Community Favorite
Joined: Apr 2004
Posts: 13,679
Likes: 84
From: missing Texas...
Originally Posted by phil6608
Are we supposed to guise what kind of truck you have? What motor , how many miles are on it??????

Phil
I'm sure we are...
 
Reply
0
Old Mar 18, 2011 | 07:49 AM
Share
  #297  
jbrew's Avatar
Technical Article Contributor
Joined: Oct 2005
Posts: 25,641
Likes: 19
From: MI
Originally Posted by pomer
my bad 600 rpm idle in neutral/park new now it's 900 rpm idle neutral/park
600 rpm's = somethings really wrong. (IAC)
900 rpm's = again, you've got problems. (Vac Leak)
 
Reply
0
Old Mar 18, 2011 | 12:17 PM
Share
  #298  
DirtySCREW's Avatar
Thread Starter
|
Technical Article Contributor
Joined: Sep 2009
Posts: 660
Likes: 0
From: NC
What's the 5.4L idle RPMs suppose to be Jbrew??---DirtySCREW
 
Reply
0
Old Mar 18, 2011 | 01:11 PM
Share
  #299  
jbrew's Avatar
Technical Article Contributor
Joined: Oct 2005
Posts: 25,641
Likes: 19
From: MI
Originally Posted by DirtySCREW
What's the 5.4L idle RPMs suppose to be Jbrew??---DirtySCREW
Between 700-750. To narrow it down even more, - average warm idle is 720-730 rpms.
 
Reply
0
Old Mar 21, 2011 | 09:56 AM
Share
  #300  
pomer's Avatar
Junior Member
Joined: Mar 2011
Posts: 8
Likes: 0
Originally Posted by pomer
my bad 600 rpm idle in neutral/park new now it's 900 rpm idle neutral/park
4.6 all stock exept k/n filter. did tranny flushes every 30,000. replaced air bypass because it had failed 1 month ago. pluged vac lines one at a time no change.
winter fuel never affect mpg this bad maybe 1-2 i get 11-12 city and 11-12 highway does not change????
 
Reply
0



Advanced Search

All times are GMT -4. The time now is 06:25 PM.