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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Idle speed adjustment question (perhaps stupid) 200 1987

posted by  machine man on  Tue Oct 21 08:05 CST 2008
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Wed Oct 22 15:40 CST 2014
[RELATED]

You got the jest of it there!

As long as the throttle body is clean and the plate is "just" resting against the stop screw (bacically shut off) it should idle low and may even stumble when the idle motor is grounded. The stop idle screw is there only because of machining tolerances. A fixed stop can not casted exactly in relationship to the bore diameter and plate pivot rod fit up.

After the by-pass air adjustment (the black knob) for the slower idle. Disconnect the ground and the engine will rev up a touch.

The engine should rev up slightly each time it is started. Just past its idle point then settle back to a smooth idle as it was set for but again higher than grounded idle because the idle control motor is now centered.

It is being adjusted to the program in the ECU because the throttle switch, is saying to the ECU, "I'm closed and want to idle".

Hope this makes it a little more clear for you.






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.