Originally posted by AFguy
How it works:
OEM oxygen sensor replaced by UEGO sensor. UEGO is wide-range; it can read A/F ratio from about 10:1 up to 50:1 or higher; OEM sensor only reads 'rich' or 'lean' of Stoic (14.7:1). All other wide-range sensors have a fairly flat output, so Vout of sensor is *roughly* linear with A/F ratio (temp and other things play into it, but the electronics take care of that...). This special controller changes that characteristic into a 'Z curve', just like the OEM sensor (output of OEM sensor is 1V for all ratios richer than 14.7:1, and 0V for all ratios leaner). The difference is that by adjusting the dial on the Cockpit Pod, this Z curve can be changed (shifted) to control at any air fuel ratio desired, as opposed to the stock sensor that always switches at Stoic. Thus, vehicles with mild to medium engine modifications benefit by being able to run a more suitable A/F ratio, usually on the rich side of Stoic. This is accomplished merely with the oxygen sensor, and all of the fuel injection parameters (transient operations, pulsewidth, timing, etc) can remain stock (or modified by some other ECU piggyback).
How this will not work:
The output of a stock o2 sensor is 14.7:1=450 mV. Anything higher than that is rich anything less than that is lean. A UEGO wideband sensor has an output of up to 5 volts, So if your saying to send that signal to your factory ECU, then that is not going to work. Another thing is, your ECU only uses the input of your O2 sensor when it is in closed loop, when you are at wide open throttle, your ecu goes into open loop. A great idea, but if it was that easy, it would have already been done.