I really think this sound is normal, but I am still just curious, and would like different opinions. Whenever I drive my Civic, and especially drive it hard, when I turn my engine off, there's a *hisssssssss* sound it makes, and it sounds like it's definitely from the intake. Has anyone else ever heard this from their car? Is it the IACV? It's not my a/c, I hardly use it, nor run hard with it on. Is this in any way a problem? Is it explainable?

Thank you in advance!

 

vacume leak?

 

Vaccum leak somewhere ...check all ur hoses

 

Really? So no chance in hell it's normal or acceptable? Definitely vacuum leak? I'll have to check it all out tomorrow. Where should I start?

 

Yup its most likely a vacume leak, Does it idle funny, or run any different?
just start checking every plug or Hose that gets vacume.

 

YouTube - Honda Civic EX exhaust

This is me, my car, my noise! At the very end of the vid, I shut my car off, and you can hear it near perfectly. EDIT: (Right at 1:34 in the video)

It doesn't idle rough or funny, though sometimes it does idle very low, but that's on sweltering hot days it seems.

Thanks

 

dude im pretty sure what yer hearing is yer Intake.
actually im like 99.9% sure

 

ya its deff yer intake man nothing to worry about.

 

That's what I wrote, and thought. I was just wondering if it's not, or if it's something I need to worry about or fix. Basically, I just want an understand of why this occurs, regardless.

Thanks!

 

lol ya idonno its just the sound aftermarket intakes make...i guess its just the air flowing that much freely.