I'm basing my afr off of the stock o2 sensor. Since the engine is stock that should be more than sufficient for what I need. All I need to know is if my mixture is rich, stoich, or lean which are the 3 positions a narrowband (stock) o2 sensors reads in through outputting millivolt signal to the ecu. I have a narrowband monitor tapped directly into that signal wire.
I have not pulled codes from the ecu because in the past it has proved to be unreliable by presenting odd code readings that I could find no corresponding error with even through contacting the dealer. This was a large reason for attempting the consult cable to monitor the information the ecu was receiving but that was unsuccessful. At his point in curious if I have a bad ecu but I would rather know it's bad before just buying one to try and finding out it's not the issue at all.
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