Hissing noise upon deceleration?
Hello, new member here so please excuse me if I am posting this in the wrong place etc. My truck is a 2002 F250 7.3 Diesel 4x4. I currently have the 4" turbo back exhaust on it as well as an EDGE programmer. Tonight I installed the AFE Stage 2 PRO DRY intake. While I was driving I noticed that when I let off the accelerator there was a sound like a rush of air from the hood. I have always kept my trucks stock when it came to engine mods so I am not sure what it could be. I would greatly appreciate any insight. Thank you in advance!!