Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Modular V8 (4.6L, 5.4L)
Sign in using an external account
Register Forgot Password?


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 07-23-2013, 06:00 PM
77mud's Avatar
77mud 77mud is online now
Postmaster
 
Join Date: Sep 2010
Posts: 4,740
77mud has a good reputation on FTE.77mud has a good reputation on FTE.77mud has a good reputation on FTE.
5.4 Lean code's.

My mother has a 2000 Ford expedition the Radiator blew 3-4 months ago and the CEL came on. I put my scanner on it checked it and it showed a P0171 and a P0174 (bank 1&2 lean) so i cleared it and told her to let me know if it came back well the other day she came to me and said it was on (and had been since the day after I had cleared it) well i swung by a buddys shop and he put his big High dollar computer on it and said that looked like Bank 2 down stream O2 was bad, So i changed that Yesterday drove it a few miles nothing came on so i dropped her car off to her and she drove it to work and bout halfway home (aprox 40-50 miles) and it poped a code so i swung by this afternoon and pulled the code excpecting to find P0171 again but instead it was P0174..... Any Ideas why changing bank 2 O2 would clear up the Bank 1 code but not Bank 2? and any ideas what else could be causing the code? Im not off again tell next monday so She is gonna take it to my buddy's shop prolly Friday and see what he can pull then.

And Yes i changed the Driver side down stream O2.
__________________
Larry
95 F350 CCDRW 7.3PSD HD Torque convertor Hayden trans cooler, shift kit. 6637 filter kit
97 F-150 4.6 4x4 manual trans case flow master's
77 F-150 BBF c6 205 9" rear 44 front 5.13's 38.5x15 Boggers rear 38.5x11.00 Boggers front
88 Comanche 4.0 HO engine few little tweeks on 35's
Reply With Quote
  #2  
Old 07-23-2013, 07:50 PM
kbsupercrew's Avatar
kbsupercrew kbsupercrew is offline
Senior User
 
Join Date: Sep 2011
Posts: 413
kbsupercrew is starting off with a positive reputation.
Usually its the up streams that sense the problem, 9 times out of 10 the o2s are fine, they are reading a vacuum leak, I would look into a air leak after the maf, which includes the intake tubing, IAc line, pcv valve and rear elbow, intake gaskets
my .02
Reply With Quote
  #3  
Old 07-24-2013, 08:04 PM
77mud's Avatar
77mud 77mud is online now
Postmaster
 
Join Date: Sep 2010
Posts: 4,740
77mud has a good reputation on FTE.77mud has a good reputation on FTE.77mud has a good reputation on FTE.
Not sure what the deal is with lights off code is gone. The o2 definitely needed changing since the wires were rubbed raw.
Reply With Quote
  #4  
Old 03-08-2014, 09:05 AM
kdwellsr kdwellsr is offline
Junior User
 
Join Date: Jun 2013
Location: North Central Arkansas
Posts: 51
kdwellsr is starting off with a positive reputation.
I know its late after last reply but I am just now getting the P0174 code. Some abbreviations confuse me if I haven't worked there before or forgot. Can you tell me what the "IAc" is?
Reply With Quote
  #5  
Old 03-09-2014, 07:06 AM
JWA's Avatar
JWA JWA is online now
Post Fiend
 
Join Date: Aug 2010
Location: Reynoldsburg, Ohio
Posts: 6,867
JWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputation
Quote:
Originally Posted by kdwellsr View Post
t. Can you tell me what the "IAc" is?
Idle Air Control.
Reply With Quote
  #6  
Old 03-09-2014, 07:20 AM
kdwellsr kdwellsr is offline
Junior User
 
Join Date: Jun 2013
Location: North Central Arkansas
Posts: 51
kdwellsr is starting off with a positive reputation.
Thank You. What things happen to indicate that the IAC is bad? Should it be cleaned or replaced if suspected bad?
Reply With Quote
  #7  
Old 03-17-2014, 07:48 PM
Tasteslikeink Tasteslikeink is offline
Freshman User
 
Join Date: Mar 2014
Posts: 31
Tasteslikeink is starting off with a positive reputation.
Spurratic idling, rough idle, rpm jumps or drops on idle.
Reply With Quote
Old 03-17-2014, 07:48 PM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
5.4 Lean code's. 77mud 1997 - 2003 F150 5 07-24-2013 08:00 PM
P0171 & P0174 50th ann 1997 - 2003 F150 6 06-23-2008 04:54 AM
98' XLT CEL P0171 & P0174 Codes njxlt Expedition & Navigator 1 09-16-2006 11:15 AM
Pulled code P0171 & P0174 on mazda mvp ??? oojbearoo General Automotive Discussion 6 03-01-2006 01:45 PM
Emission Problems edsyoung Explorer, Sport Trac, Mountaineer & Aviator 0 11-11-2003 11:54 AM


Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Modular V8 (4.6L, 5.4L)

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 08:55 AM.


Powered by vBulletin® Version 3.8.7 AC1
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