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Just about every factory fitted OEM oxy sensor I know of is narrowband.
Although some car's do have a wideband before the cat. convertor & a narrowband after it.
Why. Cause the tune is just about spot on & there's only a very small amount of fluctuation between rich & lean that the ECU has to contend with. Even if there's an air leak eg. split intake pipe, it will normally fault "oxy. sensor reading too lean"
Where as with a wideband, you can tune all the way too stupidly rich & extremely lean.
Narrowband are also a fair bit cheaper & last a hell of alot longer the wideband in my experience.
An a/f ratio is only useful if you are having minor driveability issues and want to check whether its the oxy sensor.
I can do this via my Scanguage 2 as it shows readings for both oxygen sensors in real time simultaneously.
I have oxy 1 and oxy 2 setup.
So i can see before and after cat readings and see if they are what htey normally are.
To be honest, by the time a lean out event happens its too late to stop it. You will hear a bang and damage is done. Gauges are useful for small faults but catastrophic failures wont be stopped.
*Disclaimer - Don't rely on me, seek your own professional advice. Audi R8 E-tron. 230kw 4500nm! (not a typo).
Economy at 100kph =5.5L
I understand. I would like to hook it up anyway since I already have the gauge sitting there. Just need to connect the signal wire to the correct O2 sensor wire, that's all. So gathering some info and feedback.
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