So lets say one wanted to adjust the air to fuel ratio without a chip or a tunner, for example because of a new injector size or a blower etc etc... Based on the info i collected this is what i came up with.
Granted the MAF and the O2 sensors determine the air:fuel mix.
The MAF sends an analog DC voltage to the computer of 0.5 - 5V depending on air flow. The O2 sensors send a voltage of 0-1.1V where <.4V is lean and >.6V is rich.
Now if lets say i give the computer 5v dc as the MAF input i think that will give 100% duty cycle for the injectors and ofcourse make it extremely rich (on a prettty much stock setup). I dont know what will happen when the O2 sensor notices that its rich, if it does have higher priority then the MAF input then the computer will componsate.
Now what is to stop me from giving the computer a 1V for O2 sensor input and a 5V for the MAF input? This should therefore make the car rich constantly. Yes terrible milalge will result and carbon deposits become a problem. But if one wanted to control the fuel to air mixture of the car manualy then it can be accomplished this way, by adjusting the voltage value of the imputs to be in a moreor less reasonable range a average setting can be obtained. Using some relays one can set up switching network between the stock setup and the manual setup.
Thoughts?
Comments?
Granted the MAF and the O2 sensors determine the air:fuel mix.
The MAF sends an analog DC voltage to the computer of 0.5 - 5V depending on air flow. The O2 sensors send a voltage of 0-1.1V where <.4V is lean and >.6V is rich.
Now if lets say i give the computer 5v dc as the MAF input i think that will give 100% duty cycle for the injectors and ofcourse make it extremely rich (on a prettty much stock setup). I dont know what will happen when the O2 sensor notices that its rich, if it does have higher priority then the MAF input then the computer will componsate.
Now what is to stop me from giving the computer a 1V for O2 sensor input and a 5V for the MAF input? This should therefore make the car rich constantly. Yes terrible milalge will result and carbon deposits become a problem. But if one wanted to control the fuel to air mixture of the car manualy then it can be accomplished this way, by adjusting the voltage value of the imputs to be in a moreor less reasonable range a average setting can be obtained. Using some relays one can set up switching network between the stock setup and the manual setup.
Thoughts?
Comments?