Volvo RWD 900 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 11/2015 900 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

no vacuum present 900 1993

posted by  Blindboy on  Sun Jul 3 18:59 CST 2016
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Tue Oct 21 17:56 CST 2014
[RELATED]

Should there be vacuum at the charcoal return line fitting on the throttle body??








  REPLY TO THIS MESSAGE    PRINT   SAVE 

no vacuum present 900 1993

posted by  Amarin on  Sun Jul 3 23:44 CST 2016
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Thu Oct 23 22:42 CST 2014
[RELATED]

Hi,

Vacuum only happens there when reaching cruising RPM. The two vacuum ports are located a bit behind throttle close position thats during partial throttle plate opening.

Regards,
Amarin.







  REPLY TO THIS MESSAGE    PRINT   SAVE 

no vacuum present 900 1993

posted by  Volvo From Heck on  Mon Jul 4 06:27 CST 2016
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Mon Oct 13 20:56 CST 2014
[RELATED]

As Amarin explained your condition is normal--that type vacuum is called "ported vacuum" as opposed to "manifold vacuum" found in the main part of the manifold. -- Dave







<< < > >>



©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.