symptoms that your catalytic converter is going bad
07-16-2008, 08:15 PM
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symptoms that your catalytic converter is going bad
i have a suspicion that my catalytic converters are going bad. every now and then i can smell a sulfur smell and it quite often happens when i floor it.
i called up my service consultant and he said the smell is normal if you don't drive the car often.
anyone else experience similar?
i called up my service consultant and he said the smell is normal if you don't drive the car often.
anyone else experience similar?
07-16-2008, 10:43 PM
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CLK 55
i've experienced the stinky sulfur smell the other day...and have smelled it years past (since 05)...nothing ever came from it, i dont think...i drive my car daily btw...
07-17-2008, 01:32 AM
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With the car in neutral, and idling, rev the engine to the 1500-2000 range and let it drop back down to idle again quickly. Do you hear a rattle? If so, there's a pretty good chance the welds that hold ceramic center of the cat has broken.
A sulfur smell can occasionally be corrected by changing brands of gasoline. Of course, it could be that one or both of the primary O2 sensors are going bad, allowing the car to run lean at idle. That will cause the cat to sink until it eventually kills it.
A sulfur smell can occasionally be corrected by changing brands of gasoline. Of course, it could be that one or both of the primary O2 sensors are going bad, allowing the car to run lean at idle. That will cause the cat to sink until it eventually kills it.
07-17-2008, 10:12 AM
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02 CLK 55 AMG,09 C63 loaded with P30
One of the reasons why cats stink is when you havent drove the car hard or close to it. You got to clean out them pipes once in a while. It happened to my 350z when it was new.
07-18-2008, 07:38 AM
#6
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With the car in neutral, and idling, rev the engine to the 1500-2000 range and let it drop back down to idle again quickly. Do you hear a rattle? If so, there's a pretty good chance the welds that hold ceramic center of the cat has broken.
A sulfur smell can occasionally be corrected by changing brands of gasoline. Of course, it could be that one or both of the primary O2 sensors are going bad, allowing the car to run lean at idle. That will cause the cat to sink until it eventually kills it.
A sulfur smell can occasionally be corrected by changing brands of gasoline. Of course, it could be that one or both of the primary O2 sensors are going bad, allowing the car to run lean at idle. That will cause the cat to sink until it eventually kills it.
As for the sulfur smell, rich mixtures will cause it from my experience. One cause can be an air leak between the engine and the first oxygen sensors causing the Motronic to think the mixture is lean and going rich accordingly.
11-21-2008, 05:00 PM
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2013 S550, CLS500, ‘03 SL500, “92 190E Sportline
This happened to me today
I had revved my engine a little while holding down the clutch, and almost immediately I noticed a strange smell in the cabin. I wasn't sure if it was my car or not, but after going inside the bank and getting back in the car, I noticed the smell again. Now that I read this, I think it is my oxygen sensor. I replaced the leaking cam sensors a few months ago, and I am sure that the o2 sensor was damaged from the leaking oil. 
