Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks
Sign in using an external account
Register Forgot Password?


1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 06-28-2009, 08:06 PM
SammichTheStout's Avatar
SammichTheStout SammichTheStout is offline
Freshman User
 
Join Date: Jun 2009
Location: Chestnut Hill, Philadelph
Posts: 47
SammichTheStout is starting off with a positive reputation.
9-11 MPG with a 95 F-150 300 L6 5spd

Truck has some type of performance muffler that I am going to change out for a stock unit, I know it needs an alignment, it has 120,000 miles on it, so it could probably use a stronger ignition system. It needs a valve cover gasket but I don't think it will effect mileage. I replaced the K&N filter with a stock unit because I have never had a performance filter that gave better mileage than stock. I run 40PSI front and 38PSI rear on 31" BFG Long Trail T/As. My driving is mostly city with a little highway. I know 300s should get better mileage. I'd like to know which of the factors above is the most likely culprit
Reply With Quote
  #2 (permalink)  
Old 06-28-2009, 09:24 PM
Conanski's Avatar
Conanski Conanski is offline
Post Fiend
 
Join Date: Jun 2006
Location: Ottawa, Ontario
Posts: 20,156
Conanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud of
Check fuel presure and pull the codes, that's the best way to start to diagnose your problem.
__________________
Paul (Conan) O'Brien

1990 5.0HO AOD XLT X-Cab F150 3.55LS, 1994 3.0L 5-sp x-cab Ranger 3.45, 2004 3.0L 5-sp X-cab Ranger Edge 4.10, 2004 2.5L 5-spd Subaru Legacy
1996 Kawasaki ZX11D, 2004 Honda 599, 2008 Kawasaki KLR650
Reply With Quote
  #3 (permalink)  
Old 06-28-2009, 10:45 PM
95 F150 Dude 95 F150 Dude is offline
Senior User
 
Join Date: Jul 2008
Location: Cumming, Ga
Posts: 212
95 F150 Dude is starting off with a positive reputation.
I just got back from a 400 mile trip in my 95 F150 4.9 E4OD w/ 3.31 gears and got 17.75 mpg running 75-80 w/ the A/C on. You should be getting better mileage than that.
Reply With Quote
  #4 (permalink)  
Old 06-28-2009, 11:17 PM
Towmanjbo's Avatar
Towmanjbo Towmanjbo is offline
Postmaster
 
Join Date: Apr 2002
Location: Newington, CT USA
Posts: 2,677
Towmanjbo has a great reputation on FTE.Towmanjbo has a great reputation on FTE.Towmanjbo has a great reputation on FTE.Towmanjbo has a great reputation on FTE.Towmanjbo has a great reputation on FTE.Towmanjbo has a great reputation on FTE.
What size tires were stock for that truck? When I corrected the speedo my mileage jumped 3-4 mph
__________________
Justin
Reply With Quote
  #5 (permalink)  
Old 06-29-2009, 12:03 AM
Ravenwood Ranch's Avatar
Ravenwood Ranch Ravenwood Ranch is offline
Senior User
 
Join Date: Mar 2009
Location: Hanford, CA/ Lizton, IN
Posts: 286
Ravenwood Ranch is gaining momentum as a positive member of FTE.Ravenwood Ranch is gaining momentum as a positive member of FTE.
MSGTRecon MSGTRecon247 MSGTRECON
hell my diesel gets better than that
Reply With Quote
  #6 (permalink)  
Old 06-29-2009, 07:14 AM
SammichTheStout's Avatar
SammichTheStout SammichTheStout is offline
Freshman User
 
Join Date: Jun 2009
Location: Chestnut Hill, Philadelph
Posts: 47
SammichTheStout is starting off with a positive reputation.
Quote:
Originally Posted by Towmanjbo View Post
What size tires were stock for that truck? When I corrected the speedo my mileage jumped 3-4 mph
Original tire size is 235/75/15, there are 31/10.5/15s on it now. I know I should be getting better mileage than that. Even without driving on the highway at all, I should be getting better mileage than that.
Reply With Quote
  #7 (permalink)  
Old 06-29-2009, 10:03 PM
9.ford.5's Avatar
9.ford.5 9.ford.5 is offline
Postmaster
 
Join Date: Sep 2008
Location: raymond alberta
Posts: 2,994
9.ford.5 is gaining momentum as a positive member of FTE.9.ford.5 is gaining momentum as a positive member of FTE.
my 300 gets around 11-12...with 210000 miles and a leaky head gasket among other things...ill let you know when i rebuild it haha
__________________

"blue bandit" 95 f150 4x4, 300 INLINE SIX!, 5speed, d44 SAS, NP205, 4" lift, 35x13.50 ground hawgs, 4.56's
"clifford II" 07 f350 ext. cab 4x4
05 Pete 379X, 625hp CAT, 18 spd tranny, and loads of shiney!
Reply With Quote
  #8 (permalink)  
Old 06-29-2009, 10:16 PM
FlaredFun's Avatar
FlaredFun FlaredFun is offline
Junior User
 
Join Date: Jan 2009
Posts: 57
FlaredFun is starting off with a positive reputation.
Between the tire size and whatever gearing you are running may be a big part of it.
The gearing may be loading the motor up too much and not letting it stay in the power range it was intended. Like someone else said early, if you are not correcting for the difference in actual mileage from the speedo, then that will definitely change things.

A good old tune up will usually help any engine, unless you have recently done this to it. Just some ideas. Good luck.


P.S. My truck gets between 17.5 and 19 MPG depending on how big of a hurry I am in. It has 275-60-15 tires on it. So when I am just cruising along, it gets pretty decent for a truck, BUT when I get in a hurry, it likes to drink the gas.
Reply With Quote
  #9 (permalink)  
Old 06-30-2009, 01:48 AM
Towmanjbo's Avatar
Towmanjbo Towmanjbo is offline
Postmaster
 
Join Date: Apr 2002
Location: Newington, CT USA
Posts: 2,677
Towmanjbo has a great reputation on FTE.Towmanjbo has a great reputation on FTE.Towmanjbo has a great reputation on FTE.Towmanjbo has a great reputation on FTE.Towmanjbo has a great reputation on FTE.Towmanjbo has a great reputation on FTE.
Quote:
Originally Posted by SammichTheStout View Post
Original tire size is 235/75/15, there are 31/10.5/15s on it now.
Those are the same tire sizes I had, when you update the speedo constant in the speedometer that will change the mileage by 3-4 at least.

Look here: http://www.ford-trucks.com/article/i...ND_BRONCO.html

That is what I did. Do that it's easy.
__________________
Justin
Reply With Quote
  #10 (permalink)  
Old 06-30-2009, 09:52 AM
SammichTheStout's Avatar
SammichTheStout SammichTheStout is offline
Freshman User
 
Join Date: Jun 2009
Location: Chestnut Hill, Philadelph
Posts: 47
SammichTheStout is starting off with a positive reputation.
I think the first thing I'm going to do is a Tune Up and Alignment, next will be the exhaust followed by going back to the original tire size. If that still doesn't fix it... Well, I'll see to that if it happens.
Reply With Quote
  #11 (permalink)  
Old 06-30-2009, 10:19 AM
Conanski's Avatar
Conanski Conanski is offline
Post Fiend
 
Join Date: Jun 2006
Location: Ottawa, Ontario
Posts: 20,156
Conanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud of
Quote:
Originally Posted by SammichTheStout View Post
I think the first thing I'm going to do is a Tune Up and Alignment, next will be the exhaust followed by going back to the original tire size. If that still doesn't fix it... Well, I'll see to that if it happens.
WHY not do the easy things first.. like pull the codes... BEFORE you spend any money. If you find a problem then you can address it directly instead of just shooting randomly in the dark.
__________________
Paul (Conan) O'Brien

1990 5.0HO AOD XLT X-Cab F150 3.55LS, 1994 3.0L 5-sp x-cab Ranger 3.45, 2004 3.0L 5-sp X-cab Ranger Edge 4.10, 2004 2.5L 5-spd Subaru Legacy
1996 Kawasaki ZX11D, 2004 Honda 599, 2008 Kawasaki KLR650
Reply With Quote
  #12 (permalink)  
Old 06-30-2009, 10:36 AM
quicklook2's Avatar
quicklook2 quicklook2 is offline
Post Fiend
 
Join Date: May 2004
Location: Lakewood, Ohio
Posts: 11,289
quicklook2 has a very good reputation on FTE.quicklook2 has a very good reputation on FTE.quicklook2 has a very good reputation on FTE.quicklook2 has a very good reputation on FTE.
i will add:
__________________
"To believe is to know you believe, and to know you believe is not to believe." ~ Jean-Paul Sartre
Reply With Quote
  #13 (permalink)  
Old 06-30-2009, 10:37 AM
SammichTheStout's Avatar
SammichTheStout SammichTheStout is offline
Freshman User
 
Join Date: Jun 2009
Location: Chestnut Hill, Philadelph
Posts: 47
SammichTheStout is starting off with a positive reputation.
That'l be included in the tune up.
Reply With Quote
  #14 (permalink)  
Old 06-30-2009, 11:06 AM
Conanski's Avatar
Conanski Conanski is offline
Post Fiend
 
Join Date: Jun 2006
Location: Ottawa, Ontario
Posts: 20,156
Conanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud of
And just so you know it's not hard and requires no special tools. Find the EEC test harness on the drivers side inner fender and jumper the STI and Sig-Rtn lines with a piece of wire or paperclip. Turn the key to run and count the flashes on the check engine light. You can cycle the key and count them as many times as needed to get it all right. Post up the results you get here and we'll help sort it out. Your truck should have 3 digit codes with each digit seperated by a short pause and individual codes seperated by longer pauses.
Click the image to open in full size.Click the image to open in full size.
__________________
Paul (Conan) O'Brien

1990 5.0HO AOD XLT X-Cab F150 3.55LS, 1994 3.0L 5-sp x-cab Ranger 3.45, 2004 3.0L 5-sp X-cab Ranger Edge 4.10, 2004 2.5L 5-spd Subaru Legacy
1996 Kawasaki ZX11D, 2004 Honda 599, 2008 Kawasaki KLR650
Reply With Quote
  #15 (permalink)  
Old 06-30-2009, 08:02 PM
mattri mattri is offline
Elder User
 
Join Date: Oct 2003
Posts: 761
mattri is starting off with a positive reputation.
Damn that sucks. My 95 F150 4.9 mt 2wd dances around 20mpg. I'll hit 21 21.5 every now and then but that's about it. Truck has 166k bone stock. Did a tune up a cple months ago but it didn't really change anything. Don't know what your driving style is like but I drive like an old man, it helps.
Reply With Quote
Old 06-30-2009, 08:02 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks

Tags
12mpg, 150, 1995, 1996, 300, 5spd, 91, 95, f150, ford, gear, l6, mpg, ratio, stock, v8, xlt

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 10:32 PM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup