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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Rough Idle in S90 S90-V90 1998

posted by  Gundyj on  Wed Mar 17 13:57 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Tue Jul 5 07:25 CST 2011
[RELATED]

Tonight I did switch the coil packs on #5 and #6 as suggested and that made no difference, and I put new plugs in already, so I'm thinking it's very likely the primary wire or the injector. Haven't had time to check those out yet.

Checking further with the OBD reader (which is pretty informative, now that I'm starting to understand what it's telling me) I found that the first O2 sensor was oscillating between about .75 volts and .1 volts--a bit lower than described in the FAQ, but pretty close. The second one, though, read at a flat zero--I'm assuming that's the one behind the catalytic converter.

So I'm convinced the O2 sensors aren't the immediate cause of my rough idle . . . and I just read a note on another thread from somebody who said his car's running fine with the back sensor dead. But I wonder if (assuming it really is dead) replacing it would be a good idea anyway.

Thanks again--JG






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.