I start my car like usual, I drive around do my business blah blah blah. When I turn off my car it makes a weird hiss noise. I've looked up videos to try to see if I could find out what it is and none of them are my problem

 

after using the ac ?

 

Nope, I don't use the AC. It sounds like it's coming from the engine somewhere. It's not very long either it's like a short second

 

on some hondas the ac comes on when defrost is on

after the car is turned off when pressure equalizes there is a swooshing sound

check to see

 

Okay man... Look. It's not the AC it's not the defrost none of that stuff is on. It is coming from the engine itself. When I turn off the car it shakes very harshly

 

lol ok good luck with that, man

 

Okay, figured out where it's coming from. I just recently installed an engine air intake and when I turn the engine off there's a loud hiiiiisssss sound