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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

extremely rough idle 200 1988

posted by  someone claiming to be Manolo on  Fri Apr 8 19:24 CST 2005 [RELATED]

A rough idle that smooths out at higher speeds is usually a vacuum leak.

Visually inspect all your vacuum hoses.

If you find no problems visually, use something flamable like engine starting ether or an unlit propane torch. (Be careful!) The engine will smooth out if it sucks something flamable in through the leak. Check for leaks around the intake manifold and at the fuel injectors. Is the brake assist working properly? You can get a vacuum leak if that fails.

The oxygen sensor can cause a poor idle, but generally not so bad that the engine shakes. Usually the only symptom of a failed oxygen sensor is loss of gas mileage.






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.