Volvo AWD Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 3/2021

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

That HISSING sound

posted by  MadeInJapan on  Thu Mar 23 16:32 CST 2006
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Sat Oct 2 06:34 CST 2010
[RELATED]

The brakes have a servo motor under the driver's side windshield under the hood. From there, extends a vacuum hose that is routed around to under the air filter box and then to under the air intake hose to the front of the throttle body area. I would suspect that this hose has a leak in it. Check it and replace if necessary. Not sure exactly what the servo motor and vacuum hose do, and seems unrelated to actual operation of the brakes, though I do think it is used to slow the engine when you are actually braking.
--
1998 S70 T5 Emarald Green Metallic, 2004 V70 2.5T Ruby Red, Previous Owner of Black '94 850 Turbo Wagon. My cars have been running so well lately they've got me worried.






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New That HISSING sound
posted by  Brian M.  on Thu Mar 23 07:55 CST 2006 >


<< < > >>



©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.