[olddog]

After Victor1 posted the O2 sensor range, I was pretty sure you were not in closed loop control.

If I remember correctly, you put the O2 sensors at the collectors. Several sources (not all) warn not to do this. Same claim that normal driving will not get enough heat to the O2. Maybe someone can tell us how to determine if the O2 is getting hot enough to allow the ecu to go into closed loop. I would guess that if you see the voltage output bouncing around it is working, but that is a guess based on a little knowledge.

I had a loose plug on my O2 sensor, and it tripped a code and turned on the light. It was something about the voltage not switching (it normally swings high and low). If the O2 is not working or not plugged in it will trip that code, but if it is not up to temp, it may not trip a code. I'm not sure.