We talked this thing to death at the meeting last night. I'm not convinced your issues aren't in the program loaded by Toyota. I'm still leaning hard toward an emissions calibration if it's not a sensor telling the computer to do something wrong. Theoretically it should be capable of living with the desmog just fine but if the temp sensor is adding confusion, it really could be that simple. If the computer thinks you are at 235 degrees it will adjust differently than at 195 . If your resistance values are off, like we talked, you can add a potentiometer in to adjust them and see if the behavior changes.