Originally Posted by Jp7
o2's after the precats - I mean, its obd2... no sensor after 3rd cat, not monitored.
Maybe I'm just mis-understanding your thoughts.... but many OBD2 cars/trucks have 02s after the cats. My ranger does. My milan does, my eldo did, ect... They are generally heated 02s as well.
If there is more than one cat in series
it's a "ULV" emission vehicle. Meaning there are two cats (or more) to change the exhuast emissions. To the best of my knowledge, there are no "pre-cats". Only multiple cats to meet gov standards for ultra low emission status.
Iv'e "heard" of those extenders working.. and not working. I guess each case just depends.
Personally I don't believe in global warming caused by mankind. And I think catalitic convertors do help to less polute our air. That just makes common sense.
So.. I'm for daily driver cars having them. But if the owner wants to get rid of them? IMO it ought to be legal to do so. Different topic for a different thread I reckon.