Volvo RWD 900 Forum

INDEX FOR 2/2026(CURRENT) INDEX FOR 5/2012 900 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

Engine trouble? 1994 Volvo 960 900

posted by  czar960 on  Thu Apr 21 13:38 CST 2005
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Thu Nov 4 10:07 CST 2010
[RELATED]

Hi, I hope someone can help me.
My '94 volvo 960 wagon (B-6304-S motor, 2.9 liter, 201 HP, 273,000 miles) is running real bad! It seems like it is running on 4 cylinders or 5. It started all of a sudden. Had been running pretty good.
I replaced the plugs, cleaned the flametrap, cleaned the air filter, checked for any bad vacuum hoses, sprayed the throttle body with cleaner, put in fuel injector cleaner, some dry-gas, and refilled the gas tank. So I have been over it but it still hasn't helped.

What can I try next? And where can I find out about the diagnostic "thingy" under the hood of the car?...lol...(I don't know what it is called). I would like to know how to use that and get a manual for it.

thanks, eric








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    Engine trouble? 1994 Volvo 960 900

    posted by  rwreagan on  Thu Apr 21 14:29 CST 2005
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Sun Aug 14 15:41 CST 2011
    [RELATED]

    First place to check is the OBD codes. The 700/900 FAQ (second dropdown box at the top of the page) has a link in the Table of Contents to the Engine: OBD Diagnostic Codes. It tells you about the diagnostic thingy under the hood.

    Check for a code and look it up in the table. Post back here with the results.

    FWIW, my 94 960 did the same thing. If it's a problem with a sudden onset, and the car limps on three cylinders, it could be a power stage module failure. There are two for the engine. Each one controls the ignition to three of the six cylinders. They tend to fail on cars with high mileage.

    Good luck

    Robert







<< < > >>



©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.