Originally Posted by sillyrabbit0420 View Post
As to "why" 05+ cars need a tune... I dunno exactly. The PCM is more sensitive. Like the feelings of their owners.
I'm gonna quote me and add this:
Basically, the computer is programmed to accept between x and y amount of air, so if you slap on a CAI that’s allowing in z amount of air, the computer thinks something is wrong, causing the car to run poorly or not at all.