Greetings gurus ,
I hope that some of you can help me out with my question, I want a reliable accurate wideband o2 sensor that can be viewed from inside my car, i am aware that some of them exists like AEM one, my question is: how accurate are they? say compared to a Laboratory grade A/F meter. They say that that it has +/- 0.1 point accuracy, can any one vouch for this? I'd like to do some tuning myself with my AFC2 and would like to do this as safely as possible, my car is running quite rich now because of the uprated fuel pump and injectors which i havent mapped the car for yet...

cheers