Volvo AWD V70-XC70 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 8/2004 V70-XC70 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

understanding how it works..... V70-XC70 1998

posted by  jda2000 on  Fri Oct 1 06:22 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Sun Jan 1 21:27 CST 2012
[RELATED]

The air pump system reduces emmissions during cold start ups. That's when the pump comes on and blows air thru the sas valve to allow faster warm up and to help burn off combustion gases, that are produced in greater quantity with a cold engine.

If you disconnect the air pump, you'll trip the CEL light. I don't know what would happen if you disconnect the hose from the sas valve and leave it open.

The air pump is not connected to the intake so there is no vaccuum leaks. After warm up the air pump goes off, sas valve closes and the system won't be used until next am with cold start up.

Understanding how the system works, it's what makes drilling the hole a must if you want to preserve the air pump.
--
'88 240, '92 745, '98 v70 John, Tampa Bay






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New Who's the guy who drilled a hole in his air-pump ? [V70-XC70][1998]
posted by  Ray J  on Thu Sep 30 05:06 CST 2004 >


<< < > >>



©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.