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 08-05-2011, 11:32 AM
Ford Flatbed Ford Flatbed is offline
New User
 
Join Date: Aug 2011
Posts: 3
Ford Flatbed is starting off with a positive reputation.
Horrible Gas Mileage 1988 460

I recently purchased a 1988 Ford F350 460 manual trans truck. It was in pretty bad shape but it ran. After working out all the major issues I found that the fuel mileage was alot woarse then expected. 7MPG bad on the open road. I can live with 10-12MPG, but 7! I have no clue to why it is so bad. If anyone has any advice I would really appreciate it. One thing that is a bit wierd too, is the truck pasted smog even with this issue.

Thanks
Reply With Quote
  #2 (permalink)  
Old 08-05-2011, 11:36 AM
ChristopherN ChristopherN is offline
Elder User
 
Join Date: Jun 2010
Location: Northern IL
Posts: 568
ChristopherN is starting off with a positive reputation.
Christopher Neufeldt chrisneufeldt
Have you done a tune up recently?
__________________
1993 Ford F150 Flareside 5.0 V8 AOD transmission(rebuilt 6/14/11), 3.55 gears.
182,000 Miles (as of 1/14/13)
255/70/15 tires15X8 Wheels
Cherry Bomb exhaust video!
http://youtu.be/jghOfIECfwk
Reply With Quote
  #3 (permalink)  
Old 08-05-2011, 11:59 AM
KevinGnWV's Avatar
KevinGnWV KevinGnWV is offline
The village idiot.
 
Join Date: Feb 2010
Location: Southern WV
Posts: 1,126
KevinGnWV has a good reputation on FTE.KevinGnWV has a good reputation on FTE.KevinGnWV has a good reputation on FTE.
Agreed ^^

Plugs, wires, cap & rotor, fuel and air filters all would help. Check the air pressure in your tires. Check your fuel pressure.

Also, is it 4x4? How big are the tires? What rear end gear does it have? Big tires and stock gearing will kill your MPG.
__________________
Kevin G, West Virginia

1994 Mazda B4000 ExtCab.
4X4 SE, 5 Spd.

Reply With Quote
  #4 (permalink)  
Old 08-05-2011, 12:14 PM
DIYiT's Avatar
DIYiT DIYiT is online now
Posting Guru
 
Join Date: Jul 2008
Posts: 1,200
DIYiT has a good reputation on FTE.DIYiT has a good reputation on FTE.
Aggreed X2^^

Also check the catalytic converter. My truck was doing about 8 mpg on the highway when it plugged up and my bosses '88 truck was getting about 4 mpg when its cat plugged up.
__________________
2013 F150 FX4, Ecoboost, 3.55 SCrew 5.5

1995 F-250 - Vortech 460, E40D - 4x4 3.55, Single Cab, Long Box
DIYiT's F-250 Build Thread
--Dana 60 Swap --Vortech Install
Reply With Quote
  #5 (permalink)  
Old 08-05-2011, 12:26 PM
Ford Flatbed Ford Flatbed is offline
New User
 
Join Date: Aug 2011
Posts: 3
Ford Flatbed is starting off with a positive reputation.
Yeah I went through the truck completly. It has new spark plugs, Cap, rotor, spark plug wires, air filter, fuel filter. The truck has 33's on it air pressure is at the recommend pressure on the tires. How could a guy check to see if the cat is plugged?
Reply With Quote
  #6 (permalink)  
Old 08-05-2011, 12:28 PM
Ford Flatbed Ford Flatbed is offline
New User
 
Join Date: Aug 2011
Posts: 3
Ford Flatbed is starting off with a positive reputation.
I am not sure what the gear ratio is. In 5th gear around 55-60 it is running around 2000 RPM. I would guess 3.55 to 3.75
Reply With Quote
  #7 (permalink)  
Old 08-05-2011, 12:45 PM
subford's Avatar
subford subford is online now
Post Fiend
 
Join Date: Aug 2005
Location: Easton,Ks
Posts: 16,841
subford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud of
I wish I could get 7 MPG, I only get about 5 MPG.

It sounds like you are staying in open loop. You might want to check the O2 sensor to get out of open loop and gets some driving in closed loop.

You could try driving it with a scanner on it to see if it ever changes to closed loop.
__________________
95 F150 302 4R70W EB EX-CAB
94 F53 460 E4OD COACHMEN SANTARA RV
83 F150 Flare Side 351W AOD
77 F250 351M-2V NP 435/4 Speed 4X4
subford@gmail.com
Bill K, Kansas Chapter
Reply With Quote
  #8 (permalink)  
Old 08-05-2011, 12:55 PM
1800joedaddy's Avatar
1800joedaddy 1800joedaddy is offline
Senior User
 
Join Date: Oct 2009
Location: Gridley Ks
Posts: 284
1800joedaddy is starting off with a positive reputation.
I got 14 hwy with a 3.55 geared ccswb 460. No cat, K&N filter, and E3 plugs. Got 7 b4.
__________________
85'/91' 4wd F350 RCLB 6.9
96' 4wd F250 ECSB 460 auto (DD)
96' 4wd conversion F250 ECSB PSD auto (DD)
2000' 4wd conversion F350 CCSB PSD auto
Reply With Quote
  #9 (permalink)  
Old 09-14-2012, 08:15 PM
Courtney Carver Courtney Carver is offline
New User
 
Join Date: Sep 2012
Posts: 2
Courtney Carver is starting off with a positive reputation.
Quote:
Originally Posted by 1800joedaddy View Post
I got 14 hwy with a 3.55 geared ccswb 460. No cat, K&N filter, and E3 plugs. Got 7 b4.
i just got 1988 f350 with a 460 gas engine, will not start, someone said the injectors were not pulsating, any ideas please
Reply With Quote
  #10 (permalink)  
Old 09-14-2012, 10:09 PM
dad50+ dad50+ is offline
Freshman User
 
Join Date: Aug 2012
Posts: 28
dad50+ is starting off with a positive reputation.
I don't get it. that pretty much what that vintage truck got in the day. Maybe your askin for too much out of it.
Reply With Quote
  #11 (permalink)  
Old 09-14-2012, 10:13 PM
dad50+ dad50+ is offline
Freshman User
 
Join Date: Aug 2012
Posts: 28
dad50+ is starting off with a positive reputation.
Quote:
Originally Posted by Courtney Carver View Post
i just got 1988 f350 with a 460 gas engine, will not start, someone said the injectors were not pulsating, any ideas please
Not even close to enough information to give an opinion. Can you give diagnostics. Is there spark?
Reply With Quote
  #12 (permalink)  
Old 09-15-2012, 06:06 AM
subford's Avatar
subford subford is online now
Post Fiend
 
Join Date: Aug 2005
Location: Easton,Ks
Posts: 16,841
subford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud ofsubford has much to be proud of
Put a NOID light on one of the injector plugs and find out.
__________________
95 F150 302 4R70W EB EX-CAB
94 F53 460 E4OD COACHMEN SANTARA RV
83 F150 Flare Side 351W AOD
77 F250 351M-2V NP 435/4 Speed 4X4
subford@gmail.com
Bill K, Kansas Chapter
Reply With Quote
  #13 (permalink)  
Old 04-28-2013, 09:09 PM
Animalv Animalv is offline
New User
 
Join Date: Mar 2012
Posts: 1
Animalv is starting off with a positive reputation.
What are e3 plugs who makes them
Reply With Quote
  #14 (permalink)  
Old 04-29-2013, 01:52 AM
TexasGuy001 TexasGuy001 is offline
Post Fiend
 
Join Date: Sep 2001
Posts: 9,381
TexasGuy001 has a very good reputation on FTE.TexasGuy001 has a very good reputation on FTE.TexasGuy001 has a very good reputation on FTE.TexasGuy001 has a very good reputation on FTE.
E3 plugs are Chinese snake oil like Split Fire etc. A KN is a waste of time as well. A good tune up with quality parts and fresh fluids is what would be best. The 460 should get around 10-14 mpg in stock form.
__________________
2002 Ford Ranger Extended Cab Flareside 3.0 V6 Automatic 3.73
1965 Mustang 302 T5
Fix It Up Don't %$@# It Up
Reply With Quote
  #15 (permalink)  
Old 04-29-2013, 07:30 AM
Fastback460's Avatar
Fastback460 Fastback460 is offline
Elder User
 
Join Date: Sep 2012
Posts: 531
Fastback460 has a good reputation on FTE.Fastback460 has a good reputation on FTE.
Ford_Fastback
I get about 8-10 mpg, 460, 4x4, 4.10 limited slip, K&N air filter(seemed like it made a difference all around after switching from the stock filter).
__________________
http://i816.photobucket.com/albums/zz90/Fastback_66/DSCN0676-Copy_zps04469f28.jpg
-Jake-
97 F-250HD XLT RCLB, 460 EFI, 4x4, 4.10 LS, D50, Sterling 10.25, Jasper E4OD
93 F-350 XL, RCFB dump, DRW, 351
Reply With Quote
Old 04-29-2013, 07:30 AM
Reply

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

Tags
1988, 1993, 460, 88, codes, e3, ene, f250, f350, f53, fi, ford, fuel, gas, mileage, motorhome, plug, spark

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
gain hp + improve MPG evil-90 Performance & General Engine Building 16 12-24-2013 11:00 AM
78 f250 bad gas mileage cody68zilla 1973 - 1979 F-100 & Larger F-Series Trucks 12 10-11-2013 04:05 PM
1991 Ford Van with 300 straight six LarryP2 1968-2013 Full Size Vans 4 09-05-2013 10:42 PM
1989 ford 5spd trans. Wvprince 1987 - 1996 F150 & Larger F-Series Trucks 7 07-09-2013 10:19 PM
Just bought 84 Ford E350 Cargo Van Super Econoline 1968-2013 Full Size Vans 3 05-22-2013 12:02 PM



All times are GMT -5. The time now is 05:33 AM.


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