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cabmando cabmando is offline
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Join Date: Jul 2013
Location: way down yonder in the pawpaw patch
Posts: 22,500
I touched on my thoughts as to why the cat is melting down but they assured me that the engine management is so sophisticated that if there is even a slight misfire it would set a code. I said "the cat plugged twice on this car and this thing didn't throw a single emission related code. Are you sure the engine management is as sophisticated as you think it is?"

I think it's not sensing a misfire and raw fuel is being dumped into the cat causing the cat to overheat and melt down. The tech said when he pulled the O2 sensor and started the car it blew chunks of the cat out the O2 sensor port.
Old 09-03-2020, 06:12 AM
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