Ok, I'm not sure if anyone else had this experience, but I recently noticed a hissing noise behind the radio. It hisses when the radio/fan is off. The only way I can get it to stop is to lightly slap the passenger side center console but it only stops for a minute or less and then continues. It has not gotten louder but it has not gotten softer either!

At first, I thought it might be the AC leaking, but that still works. Any ideas as to what it could be?

 

Might anyone have an idea as to what it might be?

 

Real rough stab in the dark.. Leaking flexi section on your Y pipe/factory Y.. more noticeable with radio off? .. doesn't expalin tapping centre console though.. mine sound like a turbo spool when I had a leak there

 

The hissing sounds like a 2 liter bottle when you open it VERY slowly. Again, when I lightly slap the center console with the strength of your hand hitting a table when it's about 4 inches off a table. The hissing stops for about 30 seconds then continues.

Is there any possibility that it could be the air conditioning?

Oh yea, and it continues when the radio/cd/tape is off...

 

Sounds like when you hit down hard you re:sealing something .. which slowly expands again and begins to leak.... Could it be the related to the switch/function that switches between sucking air from outside and just recirculating. When you hit the dash maybe it closes for a while

 

Hmm.. I'm not sure. The hissing sound is constant and never changes pitch when accellerating/decellerating. Fan on/off or radio on/off, the hiss continues. When everything is off, it does become annoying though...

So far, my only defense is to turn up the radio!

 

I spoke to someone who knows something about cars and their input was that it could be a vacuume seal leaking since it is close to the temperature control area. Thinking about it, it does make sense... Would I need to pull the radio + out? Might there be a way to check if it's that without doing that?