Volvo AWD V70-XC70 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 8/2017 V70-XC70 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

2003 v70 buzz buzzing intermittant car off left side engine compartment under hood V70-XC70

posted by  afm on  Mon Feb 8 08:34 CST 2016
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Sun Oct 19 04:58 CST 2014
[RELATED]

I found this earlier post very helpful... but have a question.

The car is a 2003 XC about 120K miles. The brakes work fine, no apparent change from normal.
Yesterday for the first time I heard the noise after driving the car a short distance. It lasts a couple of minutes and then stops with key in OFF position. I started and stopped several times ..... always the noise for a minute or so.
Since it's cold and snowy here....finding the problem quickly is on my mind:

I will follow the Mathews repair procedure link.

Normal braking would indicate it's not the little booster pump ???
Fuse 33 operates the Vac. switch... does the fuse also feed the Pump motor??
or is that a separate fuse...??
The fact that the noise/pump runs after shutting off the engine would indicate something (like Vac. switch is hung up.) But why would it open in a minute or so shutting off the pump??? Vacuum bleed down... it would make sense if
the Vac switch senses engine Vac and not boost pump Vac.???
You can see I am trying to make this a simple Vac. Valve replace.... by
understanding what's happening......
Thanks






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New 3 2003 v70 buzz buzzing intermittant car off left side engine compartment under hood [V70-XC70]
posted by  analyzer subscriber  on Mon Dec 30 23:14 CST 2013 >


<< < > >>



©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.