I have a weird sound coming from the front end drivers side, sounds like a air pulsating sound, open the hood and you don't hear it, its more coming from the drivers side wheel well when your not moving, step on the gas and sound is gone, normal idle its back, driven the car for 3 weeks and sound is the same, Car drives fine, its really hard to describe this sound but it sounds like a pulsating air sound or maybe like a swishing sound. its not coming from the side the belt is on either lol. Figure that out!!!

i'm thinking maybe vacuum line?