Threaded Mode
© Copyright 1995 thru 2008 - The Mustang Works™. All Rights Reserved.
MustangWorks.com is designed and hosted by Aero3 Media.
MustangWorks.com is designed and hosted by Aero3 Media.
06-12-2003, 07:36 AM
|
#8 |
|
Junior Member
Join Date: Mar 1999
Location: Ventura, California
Posts: 8,981
|
Code 91 means that your drivers side O2 sensor is reading lean. Since the right side is reading normal, that rules out a vacuum leak or a fuel pressure problem. Likely causes are a bad O2 sensor, or a bad injector in cylinders 5-8. If you don't have a miss, it's the O2 sensor. If you do have a miss, do a power balance test, and see which cylinder it is.
__________________
Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local
RED & WHITE! |
|
|
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Pulled intake and swapped fuel rails now getting codes. | Rebel79 | Windsor Power | 3 | 09-03-2002 12:13 AM |
| pulled codes and could use some advice | Conman | Windsor Power | 9 | 08-17-2002 06:41 PM |
| Pulled codes today... | bobtodd | Windsor Power | 24 | 08-08-2002 07:55 PM |
| Ok, I pulled the codes, but what the heck do they mean | tireburner163 | Windsor Power | 18 | 12-02-2001 04:12 PM |
| Pulled Codes from Car, Need Help! | StreetStang37 | Windsor Power | 11 | 09-24-2001 05:58 AM |