maybe some one can enlighten me I need to know what sensors the stock 2200 ecu uses to determine the afr and spark. and what vs what is it that gets looked at....my thinking is that maybe if we change the way the sensors without changing the computers "thought" process. what I am saying is if it looks at the ait sensor maybe we can replace the ait with a pressure sensor and change the voltage it looks at so that we effectively can use the pressure signal to tune the computer. as I stated I don't know the entirety of the computer and its sensors so if I am wrong....don't bash just educate no sense in wasting precious typing time...thanks for all that help me out.