Stalling in neutral
 

So i just recently installed a CAI on my 2010 lancer es, and i noticed when i put my car in neutral driving down a hill, my car shut off. It only stalls when i'm going at higher speeds and put it in neutral. This doesnt happen when I am at a stop sign, or a light, and there is no eratic idle. Has anyone had anything similar happen? Never had this problem before i installed the CAI, but i can't see that being the cause of the problem.