Okay so pretty much, 04 GT, manual 98,200 miles and the idle fluctuates between the highest- 1200 and the lowest- 500. When at idle the car makes a weird growling/gargling sound, link to the videos so you can listen. along with a hissing sound, which you can also hear in the video, I'm leaning more towards vacuum leak for the hissing but the rough idle and growl has me stumped.
So far I've cleaned the IAC, and everything from the air filter to the throttle body has had a good once over. I've tried the whole carb cleaner and still haven't found the leak. But at this point I'll try anything! the videos hopefully will help you guys any other questions just let me know. But the hissing sound is definitely coming from somewhere around the intake/throttle body
I STRONGLY RECONMMEND USING HEADPHONES WHEN WATCHING THE VIDEOS, IT EXPOSES THE SOUNDS A WHOLE LOT BETTER THAN SPEAKERS WOULD.
Around the exhaust
Under the hood