The message to which you are about to reply is shown first. GO TO REPLY FORM



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

ECU problem? - no closed loop? 900 1993

posted by  ronald on  Tue Nov 24 06:28 CST 2009
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Wed Oct 10 11:04 CST 2012
[RELATED]

Before admitting to a bad O2 sensor, I decided to disconnect it and see if some rough running problems would appear better without it. I disconnected both connectors and then disconnected the battery for a few minutes to clear the ECU. After driving the car for 10 minutes, I got no warning light, no codes and as far as I could tell, no closed loop operation. What's with this? I shut the car off and restarted it, still no codes. Idle was rough, like it was running rich. I reconnected the O2 sensor with the engine running and the idle smoothed out considerably. So I'm back to the drawing board again.

Help!

Ron

93 245
93 944 (new plugs, wires, cap, rotors, FPR, ECT ......)






USERNAME
Use "claim to be" below if you don't want to log in.
PASSWORD
I don't have an account. Sign me up.
CLAIM TO BE
Use only if you don't want to login (post anonymously).
ENTER CAPTCHA CODE
This is required for posting anonymously.
OPTIONS notify by email
Available only to user accounts.
SUBJECT
MODEL/YEAR
MESSAGE

DICTIONARY
LABEL(S) +
IMAGE URL *
[IMAGE LIBRARY (UPLOAD/SELECT)]

* = Field is optional.

+ = Enter space delimited labels for this post. An example entry: 240 muffler


©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.