Today when I got off work and got home.
My car seemed to make a noticeable hissing noise. I never really noticed it
before. After looking and listening arround in the engine, I found that the
hissing noise is air going into this little hole.



Engine was at idle.
How normal/much air should be going in this hole? Am I just worrying bout nothing because its 4am and I worked over time and im tired? Or is there a problem?

I thought it was some kind of referance vent, but there is defenatly suction occuring on that lil hole. The other hoses are not leaking, I checked.

 

subd

 

That's your boost control solenoid.
Connects the lower feed of the bypass valve to ambient (the open part) or to the manifold pressure. Sure the hoses are routed correctly?

 

YES I am,
When I installed my steel braiding kit, I did it ONE hose at a time so that I would not get them mixed up. The little filter foam fell off a while ago.

Can some one idle their car and check to see if theirs is sucking air in please? If its normal, cool if not... then I would guess that the Boost Control Solenoid has devoloped some kind of internal leak.
Thanks,

 

I haven't heard a noticeable hissing, but I can check tomorrow for you and let you know.

 

Thats what I'm thinking honestly.

 

Is that supposed to be open?
lol
mine is the same way

 

Its some kind of vent so ya its suposed to be open,
There is suposed to be a little filter over it, but mine kinda
fell off.

I just don't know if its suposed to be constantly sucking air in or not.

 

The braided line in ur pic has been disconnected in my car for over 2 years with no negative effects. That line goes to the boost bypass solenoid. I just left the line tucked by the fuel rail and put another 2" piece of hose with a screw in it back on. I am also missing the foam air filter.

I just checked mine and I dont have any hissing or noticeable vacuum from the filter area.

 

Ok then, I guess mine has an internal crack letting vaccume suck air from the outside So Ill have to replace it. Thanks guys

I just happened to find it on crateenginedepot.com while looking for the controler. (Found that too)
http://www.crateenginedepot.com/stor...8-P1681C0.aspx