Why does the airbox whistle?
#4
If i'm not mistaken, the filter is a charcoal filter which helps reduce the amount of emissions that leak out of the air filter when the car has been shut off. I'm not sure if the charcoal causes it to "whistle" more, but the sound is nothing to be alarmed about. All of my tCs do the exact same thing! It's simply the air being sucked through the filter at a high velocity!
#8
It whistles because Scion designed it to make it sound like an aftermarket intake. The charcoal filter has nothing to do with it. You could rip it out and it would make the same noise. The stock intake is a CAI of sorts, since it draws intake air from the fender area and not from under the hood.
#9
so that whistle sound is normal. not an intake leak right? oh and why are people so worried about hydrolock on the TC after you put the wheel well plastic back on, the filter is fully covered by it or did my slowwwww ___ forget to leave it off
#20
Originally Posted by bsp_tC
I've noticed the whistle too.... and to make it a little louder just block off the silencer after the air box before the throttle body.