i thought so ^^
replaced the thermostat yesterday....it seems the a/f gauge's sweep is shifted off the range of the gauge now. when i go wot for a couple second, it barely touches the first green LED, just sits at the end of the yellow/stoich range. under hard or light engine braking, the gauge goes to the bottom of the red/lean and bottoms out so much it just disappears off the gauge....
i had this same problem when i did the blue-wire mod on my afc2.... i think my o2 is giving a weak reading, possibly the gauge itself is weakening it to the ECU....going to cut the wire for it today