Wow, a whole two minutes of fact checking.
You are correct IAT will affect timing, however I never mentioned this earlier just to kept things simple. However, the IAT has a more significant function to provide a (for lack of a better word) correction signal to the MAF to provide the PCM a more true air flow rate. With the IAT giving a false low temperature reading, the MAF is tricked into thinking there is more air flow than there really is. Hence the PCM will add more fuel to compensate, resulting in a rich mixture. However as I briefly mentioned earlier, the PCM will eventually address this because the O2 sensor will notice the A/F being off, and cut back the injector pulse width to correct the A/F ratio.
I guess what I’m saying is, you are wrong.
