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Volvo RWD 900 Forum

INDEX FOR 11/2009(CURRENT) INDEX FOR 6/2009 900 INDEX INDEX (NO RELOAD) [<<]  [>>]

VIEW    READ ONLY    PRINT   SAVE   A    A  very rough warm-up 900 1994 posted by  mmal231294 on  Wed Jun 24 07:21 CST 2009 Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS]     [IGNORE ALL POSTS] last visit: Fri Nov 20 14:41 CST 2009 [RELATED] The FPR is very easy to test, use the "see how quick it fills a bell jar" test described in the FAQ's. That is a fairly common failure. The temp sensor(ECT) could be failing but it will make the vehicle run rich and if that were the cause of what you are describing you would certainly be smelling the rich exhaust and perhaps seeing black smoke. It almost sounds more like your catalytic convertor has broken apart internally and piece is intermitently clogging/restricting flow. You test this, there is a small round plug upstream of the cat which you can pop off when the car is running like crap and see if smooths out. Also when was the last time you cleaned your Throttle body? Mark this post as an answer to my question<- Use this feature to mark quality replies to your post. Select, copy to buffer, and paste anywhere: <a href="http://www.brickboard.com/RWD/volvo/1356270/940/960/980/V90/S90/rough_warmup.html">very rough warm-up</a>

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• very rough warm-up [900][1994]
  posted by  mmal231294  on Wed Jun 24 07:21 CST 2009 > V
  • very rough warm-up [900][1994]
    posted by  janglim  on Wed Jun 24 22:31 CST 2009 > V
    • very rough warm-up [900][1994]
      posted by  janglim  on Sun Jun 28 17:58 CST 2009 > V
      • very rough warm-up [900][1994]
        posted by  mmal231294  on Thu Jul 2 12:02 CST 2009 > V
        • very rough warm-up - solved [900][1994]
          posted by  janglim  on Sun Jul 5 11:53 CST 2009 > V

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