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  
Old 11-24-2008, 10:27 PM
glkearns glkearns is offline
Junior User
 
Join Date: Mar 2003
Posts: 51
glkearns is starting off with a positive reputation.
P 171, 174(bank 1/2 too lean) codes

So, over the past couple of weeks I have been trying to get rid of the above codes, Here's what I've done.

Changed fuel filter
2 bottles of injector cleaner
tune up(plugs wires cap rotor pcv)Did this step because of another code(don't recall the number but it was a misfire in cyl 6)

After all of that I am stuck, the MIL is back on after just a few miles, and It is still missing intermittantly mostly at highway speeds.

What's next? Injectors? commercial grade injector cleaner(jiffy lube?)

Its a 96 4.9l 5speed with 225k on the ticker

Greg
Reply With Quote
  #2  
Old 11-25-2008, 07:01 AM
whsmith_jr whsmith_jr is offline
Freshman User
 
Join Date: Feb 2004
Location: Crestview, FL
Posts: 29
whsmith_jr is starting off with a positive reputation.
Key in on things that will impact both banks. I had this same problem on my daughters 95 Mustang (3.8). I found a couple of vacuum leaks, but that didn't fix the problem. I noticed that the Baro reading was reading like we were at around 5,000 feet, but we are close to sea level. I cleaned the MAF and the Baro reading corrected itself. The codes have not been back!

Smitty
Reply With Quote
  #3  
Old 11-25-2008, 07:45 AM
Conanski's Avatar
Conanski Conanski is offline
Post Fiend
 
Join Date: Jun 2006
Location: Ottawa, Ontario
Posts: 20,168
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
These codes are telling you the computer has made as much adjustment as it can but the right side O2 sensor still isn't switching, this probably means the sensor is bad if there are no other codes. If you had codes indicating both banks were at adaptive limit then I would suspect a fuel pressure problem or blown FPR but that's not the case.
__________________
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
  #4  
Old 11-25-2008, 01:34 PM
NewEnglandHerdsman's Avatar
NewEnglandHerdsman NewEnglandHerdsman is offline
Moderatee...
 
Join Date: Jul 2004
Location: in the woods of MA
Posts: 5,298
NewEnglandHerdsman has a spectacular reputation.NewEnglandHerdsman has a spectacular reputation.NewEnglandHerdsman has a spectacular reputation.NewEnglandHerdsman has a spectacular reputation.NewEnglandHerdsman has a spectacular reputation.NewEnglandHerdsman has a spectacular reputation.NewEnglandHerdsman has a spectacular reputation.NewEnglandHerdsman has a spectacular reputation.NewEnglandHerdsman has a spectacular reputation.NewEnglandHerdsman has a spectacular reputation.NewEnglandHerdsman has a spectacular reputation.
Correct me if I'm wrong, but P171 AND P174 means both banks are lean... Since the likelihood of both sensors going bad at once is pretty slim - so a fuel delivery problem is more likely, yes?

I'd second checking the fuel pressure and pressure regulator...
__________________
Jim - - Official FTE Forum "Wet Blanket"
2006 F-350 5.4 4wd ---2012 Escape Limited 4wd -- 2008 Escape XLT
4wd --- 2004 Mustang ---
"90% of the game is half mental.” Yogi Berra
Reply With Quote
  #5  
Old 11-25-2008, 01:53 PM
Conanski's Avatar
Conanski Conanski is offline
Post Fiend
 
Join Date: Jun 2006
Location: Ottawa, Ontario
Posts: 20,168
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
Yes.. '96 F150 is OBD-2 which makes a difference.. I was looking at OBD-1 codes.
__________________
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
  #6  
Old 11-25-2008, 11:35 PM
glkearns glkearns is offline
Junior User
 
Join Date: Mar 2003
Posts: 51
glkearns is starting off with a positive reputation.
Found 2 vacuum leaks today, and repaired...seemed to help a little bit, but we'll see if the code returns.

Greg
Reply With Quote
  #7  
Old 12-05-2008, 08:04 PM
William Green William Green is offline
New User
 
Join Date: Dec 2008
Posts: 3
William Green is starting off with a positive reputation.
Hey glkearns we got the same problem same year what the hell I pulled my back tank and bad fuel pump and toss it behind the shed and rerouted the plumbing still a low pressure on the injectors so says the mechanic at the shop now I have to replace the other fuel pump it's always something let me know how you solve your problem.Thanks
Reply With Quote
  #8  
Old 12-06-2008, 01:48 AM
glkearns glkearns is offline
Junior User
 
Join Date: Mar 2003
Posts: 51
glkearns is starting off with a positive reputation.
Check your vacuum lines. My codes havn't been back. Now I am just waiting for all the self checks to get done to pass smog. I'm changing my t'stat out tomorrow (back to a 195 deg from 160 deg) apparantly it's not exiting warm up and the computer won't complete the self tests without...If that's not it, I start changing o2 sensors.


greg
Reply With Quote
Old 12-06-2008, 01:48 AM
Reply

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

Tags
171, 171174, 174, 1996, 96, 97, bronco, code, codes, f150, ford, lean, obdp171code, p171, p174, ranger

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 09:00 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. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup