I recently installed a PLX wideband and got rid of the factory rear o2 sensor. I patched the rear o2 heater the tied the narrow band output into the ecu o2 factory input. I want to log my afr through the ecu scan. Right now it is reading but what I dont know is how acurate that reading is and I dont have any way to verify it. Does anyone have any experience with this that can shed some light on it. thanks for everyones help.

 

I've been on a PLX for a few years, it works fine & logs fine.

I use 0.039137*x+10.0 for the formula, ground offsets will play a factor into how acurate this scaling is though. Keep in mind there will be a slight delay logging through the ECU.

 

great, thanks alot. Will the delay be a similar amount throughout all the sensors i am logging through the ecu since they are all travaling a similar signal rought or will it be slightly more and is it enought that I need to account for the delay when looking at my loggs to tune.
Sorry for all the questions but just trying to make sure I get it all right the first time, dont want to hurt my car.
thanks for all the help

 

In my logs it's only off about 1 line, so not very much....It's pretty easy to see.