As I understand, the fuel mixture occilates up and down somewhat with 14.7 being the avarage, which provides fuel and oxygen for the catalytic converter. If the catalytic converter is removed the second oxygen sensor is disabled so as not to throw a check engine code. My question is: When this is done, does the mixture then go flatline? Like I would assume that it should? Or does it keep dumping unburned air and fuel into the exhaust for the now missing catalytic converter to not use?
I've not found a satisfactory answer to this anywhere.