Hissing under throttle

[FallenPhoenix]

I don't have a CAI (yet ) and under any sort of throttle more than none I hear a hissing coming from the front of the car. Any idea what this could be? Everything is completely stock right now as far as mechanicals.

 

[Gearbanger 101]

Sound just like air rushing into the throttle body and down the intake track to me. Do you notice it when you're driving, or at idle, with the hood up?

 

[FallenPhoenix]

so far only when driving, I'll try it later tonight sitting still with the hood up and down

 

[HurricaneJesus]

Yeah, I've got the same thing happening and I've got a 70mm TB with CAI...I guess when I grab a new plenum I'll get the 75..hopefully that'll be part of my feb mod budget

 

[tomustang]

usually people say stock but have a K&N, you got one?

 

[FallenPhoenix]

nope, still have the same paper filter that came with the car (just rolled over 4k mi) I've got a JLT CAI coming either tommorow or friday though.