My 03 Rosso Corsa has a 02 sensor, not connected since there is a 15M ECU onboard,, with great mapping. She runs very good, sometimes somedays, she has to open her mouth a little bit, tiny sneeze, hick, nothing serious.
Since I have a 15RC Cali ECU on the shelf, out of curiosity I will install a new Bosch 02 sensor and the 15RC, and see what happens ?
Cheers tom.