I keep getting a loud hum noise from my intake it happens alot when its really cold outside. It happens when i turn on my defroster and sometimes when i turn on headlights. ii say its from my air intake b/c when i popped the hood thats the only real place that i can seem to hear it. I'v even whent to bottom of the fender and it gets louder at the fillter. When it happens it makes my RPMS stick up high around 1000-2000. I can make it go away when i give it gas a few times. i have know idea what it is but if it has happened to anyone else plz tell me lol.