Clogged Cat, Slip Control Warnings, stealership ranting

[D_Eclipse9916]

It should use MAP and MAF and whatever else to determine fuel needs and, instead of applying adjustments according to O2 feedback, it will realize the O2 is not "switching" assume it is faulty, and continue to get reaaaaallll close using the other inputs handicapped only slightly by a loss of feedback.

I have diagnosed several clogged cats by removing the O2 sensor in fron of the cat and suddenly the car goes from choking at 3K rpms to revving freely.

It's been several years so perhaps strategies have changed. I wouldn't think a MFR would want to have a situation where the car becomes undrivable due to a faulty O2 sensor. Best to just set a code and continue to fuel based on the other inputs.

It will use pre-based maps within the ECU based on the hertz of airflow and intake air temperature. The o2 was mainly put in cars for emissions purposes, but it does allow us to get as clean an idle as possible. A car does not need to be 14.7:1 to have a nice idle, hence why a lot of dsm people "lean burn" their o2s so that they get better cruising and idle gas mileage. This however produces more "bad emissions". The idle stability of a vehicle more depends on the ECU tables, MAF, IAT, and idle speed switch.