I know they're a power robing device, especially when they clog. But, I need to know if removing the honeycomb from the cat and welding it back shut will result in my have a continually lit CEL light...
If the CEL light is a reality, is there anything to do to override it... Checking the manual, it's inconclusive if there is a post cat oxy sensor, and I don't think I want to lay around in 4 inches of mud to find out...
Also, my fuel economy has been slowly declining as the power loss is happening. However, there is no discernible blow by when running the engine with the oil filler cap off, and no oil or coolant leaks I can find to indicate head gasket failure....

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All it takes for evil to prevail is for good men to stand by and do nothing.

Too many people tip toe through life, never attempting or doing anything great, hoping to make it safely to death... Bob Proctor

'95 S320 LWB
'87 300SDL
'04 E500 wagon 4matic