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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

madding intermittent hesitation 200 1988

posted by  Volvodad on  Mon Oct 1 15:24 CST 2012
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Thu Oct 23 16:18 CST 2014
[RELATED]

You mentioned blocking the hot air intake in an earlier post because of failed airbox thermostats. If you blocked the hot air inlet from the outside, without permanently fixing the flap in the interior of the airbox in the cold air position, then that flap will - with a failed 'stat - swing over and block the cold air.

You then have a strangled airbox...hot air blocked from the outside, and cold air blocked by the flap. The car will run rich, particularly when warmed up, possibly giving the symptoms you experienced.

A good way to bypass the airbox thermostat is to remove it and substitute a cutoff nail of the correct length to hold the flap in the cold position, blocking the hot intake port. Or remove the flap assembly entirely and block the hot air port from the inside. Either way, you can then reconnect the preheat hose, so it passes a visual emissions check.

--
Bob: son's XC70, dtr's '94-940, my 81GL, 83-DL, 89-745(V8) and 98-S90. Also 77-MGB and some old motorcycles.






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.