I was messing with the scope today trying to pinpoint my missfire when the engine is hot and idling. Knock sensors, CKP, pulse width, IAT, ECT,TPS, and air flow signals are all operating normal. The O2 sensor however drops below .1v at idle. Now i know its not supposed to do that on obd cars, but what about the supra? The tsrm says to only test O2 at 2500rpm. As you can see it stays rich at wot, and goes lean at fuel cut like it should. It also behaves correctly with load applied. And as far as my misfire at idle im getting no detonation, or pulse width fluctuations so its safe to say its not a fuel control problem and most likely spark?
[video=youtube;aAh3Y_zdhmA]https://www.youtube.com/watch?v=aAh3Y_zdhmA&feature=youtube_gdata_player[/video]
[video=youtube;aAh3Y_zdhmA]https://www.youtube.com/watch?v=aAh3Y_zdhmA&feature=youtube_gdata_player[/video]