"c_norm" is basically a reciprocal slope value of engine displacement, normalized for a standard pressure of 29.95inHg and an temperature correction...
Where would you recommend locating the pre-cat o2 sensors in a new exhaust system for the most accurate readings?
( Shorty headers, New cats, Pipes,...
So yes you can connect to the 03-05 Aviator PCM but thus far we have not been able to read the stock file. Working with HPT to get a successful read...