Decal on Support says "DO NOT TOUCH..."

[Ford Assassin]

Originally Posted by Suburbanite88

Yeah, I considered that, but I thought the "Check Engine" light would be on ("Service Engine Soon" light?) if the CAT was clogged, inefficient, not operating properly...

I have had two GM TBI engines have the cats clog up and neither gave a check engine light. On OBD I computers, they had no way to know if the converter has gone bad.

On later model ('96+), there is a rear O2 sensor(s) after the cat(s) that will produce a check engine light if one goes bad.