What causes cats to clog?
04-11-2004, 09:38 PM
#1
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Join Date: Apr 2002
Location: Clinton Twp, MI
Posts: 356
What causes cats to clog?
I think my cats are clogged. I've been getting a faint smell of rotten eggs lately from my exhaust. Also, I've noticed it doesn't pull as hard as it used to. My car is a 01 z28 a4. It only has 36k miles on it and I always run premium gas. What actually causes them to clog? Also, what makes the smell? I guess I can just remove them or gut them untill I get my lt's. I'm guessing clogged cats reduce gas milleage. In MI they don't do emissions so it wouldn't hurt anything. But would it throw a code? A lot of questions, I know, but thanks for any info.
04-12-2004, 05:07 PM
#5
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Join Date: Nov 2002
Location: Indiana
Posts: 587
If you only have 36,000 miles on your car, then the cats are under warranty as an emissions device. Cats can get clogged by excessive heat melting the brick face in places, destroying the cells. Running lean could conceivably do damage, but standard PCM programs have tables built in to add fuel in certain high-heat WOT conditions that should keep the heat from getting that severe.
Removing the cats will cause the PCM to throw a code.
Not positive, but there may be a TSB related to the sulfur smell you're experiencing.
Removing the cats will cause the PCM to throw a code.
Not positive, but there may be a TSB related to the sulfur smell you're experiencing.
04-12-2004, 06:30 PM
#8
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Join Date: Apr 2002
Location: Clinton Twp, MI
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Originally posted by nateh
If you only have 36,000 miles on your car, then the cats are under warranty as an emissions device. Cats can get clogged by excessive heat melting the brick face in places, destroying the cells. Running lean could conceivably do damage, but standard PCM programs have tables built in to add fuel in certain high-heat WOT conditions that should keep the heat from getting that severe.
Removing the cats will cause the PCM to throw a code.
Not positive, but there may be a TSB related to the sulfur smell you're experiencing.
If you only have 36,000 miles on your car, then the cats are under warranty as an emissions device. Cats can get clogged by excessive heat melting the brick face in places, destroying the cells. Running lean could conceivably do damage, but standard PCM programs have tables built in to add fuel in certain high-heat WOT conditions that should keep the heat from getting that severe.
Removing the cats will cause the PCM to throw a code.
Not positive, but there may be a TSB related to the sulfur smell you're experiencing.
04-12-2004, 06:33 PM
#9
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Join Date: Dec 2002
Location: bluffton south carolina
Posts: 318
my cat clogged we believe anyway ....my brother punched it out and my car has been better but not her self since .....i think my opti might be failing....my car has 73000 miles on it and is 9 year old
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