O2 sensor functioning properly, check with a VTVM. Titania vs Zirconia. 1988 300zxt ecu

that's a Vacuum Tube Volt Meter. I used this for the analog output of the needle swing, vs the DVM (digital volt meter) that is hard to read with rapidly changing voltages. I also wanted to see how the different types of 02 sensors (T vs Z) would work or not work with the 1988 300zxt ECU.

[@davewm9589]

note the ECU was set to MODE 1 which is ONLY the green light. I should have had it set to MODE 2 which would have shown the red light flashing with the green showing closed loop function.