Volvo RWD 900 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 8/2004 900 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

rythmic surging idle 900

posted by  matt82dl on  Thu Apr 22 16:04 CST 2010
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Mon Oct 13 10:46 CST 2014
[RELATED]

My idle has been loping for some time now. I have checked all the vacuum lines, checked corrugated tube from airbox to TB. Cleaned TB, and replaced gasket, cleaned IAC. checked but didnt repalce intake manifold gasket. Not sure what else to check.

One thing I have noticed: When I remove the 1" tube from the airbox, there is a rythmic gasping sound from the tube. I can get the idle to smooth out by metering the tube opening with my thumb. Could the iac been going bad??

Cap, rotor, plugs, air filter are relatively new.

Thanks,
Matt



--
'90 245 252k, '93 945 230k






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New rythmic surging idle [900]
posted by  matt82dl  on Thu Apr 22 16:04 CST 2010 >


<< < > >>



©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.