Today’s cars are heavily festooned with a multitude of sensors, many of them focused on internal parameters and hard-wired into the vehicles nerve system. Whether having so many sensors is a good idea ...
However, the state still says you're free to flash an ECU to stock and return the tune after the test. It all started with Gran Turismo. From those early PlayStation days, Sean was drawn to anything ...
Really depends on the car. If you have a distributorless setup, I would imagine it does but again depends on the year of the car and type.