Close/Open Loop...

[vroooom]

Air Fuel A/F Ratio Basics | Wideband vs Narrow O2 sensor

I just read the link above and was wondering if anyone know if our O2 sensor is narrow or wide. so basically the O2 sensor registers its reading in voltage, which is why the memjet, fatduc or optimizer is just basically just a resistor? You're basically manipulating the voltage reading of the O2 sensor so the close loop would richen it up to stoic. did i get that right?

[Mr Mike]

Originally Posted by vroooom

Air Fuel A/F Ratio Basics | Wideband vs Narrow O2 sensor

I just read the link above and was wondering if anyone know if our O2 sensor is narrow or wide. so basically the O2 sensor registers its reading in voltage, which is why the memjet, fatduc or optimizer is just basically just a resistor? You're basically manipulating the voltage reading of the O2 sensor so the close loop would richen it up to stoic. did i get that right?

Ours is narrow band and works closed loop at lower RPMs. Above 4k rpm runs open loop
02s are more complicated than a resistor.
optimizer does "manipulate" the 02 signal to CPU
Memjet (air temp) and fat duc(non siemens 02) are resistors