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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

AIR CONTROL VALVE SYSTEM 200 1989

posted by  JOHNVON on  Mon Aug 1 17:43 CST 2005
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Tue Dec 18 16:18 CST 2007
[RELATED]

1989 240DL On a trip this weekend the idle speed began to increase. An hour into the trip home the idle would race up and down. Cleaned mechanism in valve. Tested to battery. Snaps back and forth. Car still revs up and down. Disconnected both in and out hoses and blew in. No air leaks. With engine running and control valve intake hose disconnected and plugged car idles fine, and when the engine speed in increased/decreased the vacuum in the intake decreased/increased. (Slow idle, increased vacuum.) The valve mechanism seems to be functioning correctly. How can I tell if it is the computer? What else do I want to check? When the valve is in the closed postion there is a gap of less than 1/16" where it isn't sealed off. Assume this is normal.
Anybody been here before?





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.