reverbman Posted April 10, 2004 Report Share Posted April 10, 2004 I recently purchased a 94 Deville ( I love this car!) with 100K miles. I notice a moderately strong sulphur odor at times when car is idling, and also a carbon smell when I come to a quick stop. The catalytic converter is new, and I've tried different brands of gasoline (as indicated by other users as potential problem) with no success. I was considering replacing the two oxygen sensors on this 4.9 engine. Since I'm not experiencing excessively poor gas mileage, and I'm not receiving any error codes, is this a worthwhile (about $50 for the cost of 2 sensors) exercise, or inviting trouble where no real problem exists? I'm leaning towards replacing both sensors, but have never done this before. Any installation issues to consider before undertaking this task? I appreciate any input on this. Link to comment Share on other sites More sharing options...
Ranger Posted April 10, 2004 Report Share Posted April 10, 2004 Before replacing the O2 sensors, check for a leaky FPR and/or fuel injectors. My understanding is that a sulfer smell usually is from a rich fuel condition. Link to comment Share on other sites More sharing options...
67coupedeville Posted April 12, 2004 Report Share Posted April 12, 2004 My experience was with my 1992 Chev Pick-Up. It has a 350 TBI, and had a reaked like rotten eggs after a long period of time of driving. I heard that when a catalytic converter becomes plugged or full, it makes your exhaust smell like sulfur. I cut out my cat' and the smell went away. Apparently it is suppose to make more horsepower but I noticed no difference. It did however give me a really nice exhaust note. I am lucky for there are no emissions tests where I live and no 02 sensors were bothered by me doing this. On a Cadillac I would not be so sure . Spence Link to comment Share on other sites More sharing options...
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