Hi,

Just joined.

My goal is to try to learn how to tune.

My specific goal is to:

Modify the ECU calibration to disable the Secondary Air Injection (SAI) system and catalytic converter monitoring so the ECU no longer runs those diagnostics or triggers fault codes after the hardware is removed.

However, I may want to do other things in the future, so I want to learn how to do it myself, and generally like learning things myself and doing it myself.

I'm recording my progress on another site at this:
https://www.ttforum.co.uk/threads/how-to-learn-how-to-tune-change-ecu-calibration.2046325/