I have added some new parts to my engine, and this part of the season the air temps can change up to 40degs in a day. I noticed doing data logs during different times of the day are throwing my VE all over the place. I see no place to change this in the "stock" tune. After searching on here I have found:
1. "lock" the IAT into one temp (is there a way in the pcm?).
2. Upgrade to cos5 and use A0014
3. If option 1 is not available, install a resistor inplace of my IAT while doing data logs.
4. Log during the same time every day, which doesnt help really cause even from day to day, you get about 10deg difference.
Now, also, if I go with option 1 or 3, then my fuel is going to be way off if I drive during really hot times, or really cold times correct? Making cos5 really my best choice? Any other thoughts?
Why/how would GM not have some option in the stock tunes to not adjust for this better then it does?