Volvo RWD 900 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 7/2002 900 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

engine vibration at 3000rpm 900 1993

posted by  SLong on  Fri Dec 8 14:32 CST 2006
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Thu Oct 23 19:52 CST 2014
[RELATED]

My 1993 945T with 91K on it has a pretty substantial vibration between 2500-3000rpm. This happens in any gear, and is worse under load. The severity seems also to be influenced by the octane of gas, so now I use only 93 - but it is still quite bad. I have cleaned the throttle body and replaced cap, rotor, and wires. I also replaced the transmission mount. The car has pretty good power, and idles smoothly - although at about 950rpm. I can't get the idle down to ~700rpm even after cleaning throttle body and the idle control valve, adjusting the idle control switch, and replacing most of the vacuum lines. The car stalls if I block the flow of air through the idle control valve - so I don't suspect a vacuum leak. I did notice a bit of play in the distributor, but am not sure how much is OK. I would appreciate any advice.

Steve
--
1986 745 w/ M46 200K since new, 1995 965 104K







<< < > >>



©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.