so my ac blow cold air when it wants to. fan works, not low on freon, but when im driving theac will randomly switch in between receiving air from the outside and circulating it in the cab. help? its hot out here

 

Your AC switch panel has a white data cable that may be damaged. Another quirk on the 350z is that if you over tighten the screws holding the climate control, it slightly distorts, and causes oddball issues with AC. You could also have dried up soda stuck in the dials.

 

It's still Summer, a lot of shops will do a free A/C check for you and a diagnostic.