Well, I spoof my IAT to everyone's dismay. You may want to spoof it for the time being and take it out of the equation. Watch your coolant temps, they also play a factor and the outside air temps may not allow the radiator to cool the motor the same. The mini afc is a nice unit, but try to keep things no lower than 95% or higher than 105%, or the 02's will really get flaky. To check if the 02 sensor is getting "lazy" and needing replacement watch the "crosscounts". The quicker it switches from high to low the better. If the 02's dwell low or high for etended periods of time it may be time to put in a new one. If you do replace it, get only the AC delco unit, the Bosch one sucks ass. Casper's has the best price on them.
