Can anyone help me identify what this hissing noise is? I only hear it when the engine is running... it sounds like an air leak. It's not a constant hiss, but it does hiss (pause) hiss and so on... I know its not the tire because it only happens when the engine is on.

Its an 04 coupe... hrmm

 

u get an aftermarket intake for purchase a z-tube?

 

I bet its a snake!

 

your car is just letting off some excess gas.. does it smell like baked beans?

 

im running factory exhaust, no ztube or anything..., all oem...

i dont notice a smell at all... i hope its ok...

 

i was joking beans make u fart as they say

 

Look for a crack in your piping. It could be something else that I'm not familiar with, but if it's a crack, you won't always hear air leaking out depending on how much air is flowing through the piping.

 

if it is a crack in my piping, is it a real serious problem that i need to get fix? or will i be ok?