Questionable shut off sound :(

[lkstatus]

Hi everybody,
So what I have is a fully stock 95 GS-T with 72,xxx miles on it. I've never had a problem with it and it is rarely pushed hard.
A few weeks ago, I noticed a soft hiss sound from the engine bay every time I shut off the car. Today, the sound is noticeably louder.
Here's a YouTube link to a recording of my car shutting off:

YouTube - Mitsubishi Eclipse GS-T

Thank you so much for the help in advance!

 

[Friend-O]

I would imagine the high pitched squeal at shut off is related? The only guess I can give you based on a healthy running engine is that your pcv valve might be gummed up or blocked causing excess crankcase pressure to slowly leak by after shutoff.

 

[davidalindsey]

Funny thing after I read your post, I am getting the same sound.
When I shut off my car it makes a very faint whistle sound just like the video, But not as loud.
Any answers...

 

[juanpac0]

Mine does it even if I crank it two or three times without starting it, I think it's part of the EVAP system. I have a brand new OEM PCV valve and it did it before and after it was replaced.

 

[helluvadsm]

sounds like a pully that needs to be greased to me..
That or a belt

 

[HadesOmega]

Hmm never heard that sound before I think, 217k miles