Muddy98
NAXJA Forum User
- Location
- Medford, OR
I have a 2000 cherokee with the ca emissions exhaust system and it has the popular 0331 cracked head problem. The previous owner has toasted the rest of the motor so I want to swap it with a 99 motor i have and use the exhaust manifold from the donor vehicle without having to use an adapter that hinders the flow of the head in anyway. i have searched through the web for the last 36 hours trying my best to find a definitive answer on if the downstream 02 sensors after the mini cats have any purpose other than seeing if the cats are in fact still there.
All I'm curious about is the down stream sensors
All I have read is debate after debate half say its essential to the air and fuel ratio and it makes sure the cats come up to the correct temp and that it'll continue to run rich forever trying to heat the cats up.
The other half say they are just there to see if the cat is still in place and only throw a cef light and checks to see if the cat is there.
does anyone have a real answer that has done it themselves? Or have some kind of reference to an ex jeep employee or documentation,
or just plain experience?
All I'm curious about is the down stream sensors
All I have read is debate after debate half say its essential to the air and fuel ratio and it makes sure the cats come up to the correct temp and that it'll continue to run rich forever trying to heat the cats up.
The other half say they are just there to see if the cat is still in place and only throw a cef light and checks to see if the cat is there.
does anyone have a real answer that has done it themselves? Or have some kind of reference to an ex jeep employee or documentation,
or just plain experience?