Guest Posted December 16, 2002 Share Posted December 16, 2002 My '89 has been putting out a noxious burning odor for a few months. Does this sound like a toasted cat or maybe just "O2" sensor? When stopped in traffic the odor can overwhelm. If it is the cat causing the problem is this a replacement or can they be evacuated through a drain plug? I've never looked at mine closely. Thanks for any suggestions. P.S. It seems to have affected the around town mileage drastically. Link to comment Share on other sites More sharing options...
Guest Buick Mike Posted December 16, 2002 Share Posted December 16, 2002 If it smells like rotten eggs, it's your cat. They can't be flushed or anything like that... time for a new one.Mike Link to comment Share on other sites More sharing options...
waltmail Posted December 16, 2002 Share Posted December 16, 2002 Okay. It does have the smell of rotten eggs if you can get past the burning acid smell. It will cause large quantities of Murine to be used. Link to comment Share on other sites More sharing options...
padgett Posted December 17, 2002 Share Posted December 17, 2002 Rotten eggs :: sulphur dioxide. This and sulphuric acid mist is not a normal engine exhaust component but <big>is</big> the result of a fuctioning catalytic converter and an over rich engine mixture.Two most likely culprits:- engine running open loop- faulty (but not failed) 02 sensor. Link to comment Share on other sites More sharing options...
Guest Posted December 17, 2002 Share Posted December 17, 2002 Could it be that the PCV is plugged? Link to comment Share on other sites More sharing options...
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