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Old 04-05-2005, 06:00 PM
Duke2.6 Duke2.6 is offline
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Join Date: Mar 2003
Location: Southern California
Posts: 2,276
Originally Posted by lofat
If you are running rich to the point that your mpg's and power have dropped considerably there is a strong likelyhood that you have cooked your catalytic converter.
I dispute this statement. If the engine is running rich there is no O2 in the exhaust to support oxidation, nor will reduction be supported, so the catalyst just doesn't do anything. The matrix may temporarily foul with hydrocarbons, but they should burn off and the catalyst's performance will return to normal with time once the correct stoichiometric mixture is restored.

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