I kind of a hypercondriac when it comes to my car, so these could all be perfectly normal noises, but for peace of mind i would like someone to verify that they are. The first noise happens when i turn the car off, it kind of makes a growning noise while the engine stops, is this normal? The second is a hissing noise i can hear comming from around the air intake, it makes me think that maybe one of the hoses is leaking, but i cant find any holes. The last one is a squeking noise i can hear when i have the windows down, it seems to happen when im going up a steep hill, any ideas? I know these are probably stupid worrys since the car seems to run fine, but i would just like some input. Thanks.