EJK controller plugs into the fuel injectors and the temp sensor.
The YELLOW/BLUE mode controls the voltage offset of the temp sensor which can be used to indirectly subtact fuel from the
snowmobile. A setting of 0.5 is like running on the stock ECU map. A setting of 8 will result in the largest voltage
offset of 1.2 volts allowed by the tune-up.
The GREEN zone engages at 3900 rpm with a GREEN/BLUE setting of 4.