I just purchased a 2014 F150 with the 5.0 to replace my 2013 F150 that ended up being a total loss after a accident. When I shut the engine off there is a sound almost like air being released. It is a short burst that happens right after the engine stops. I am taking it in to the dealer to see if this is normal. I have about 500 miles on the truck. Any ideas on what it could be? Thanks. It didn't happen with my other truck same engine.

 

It's the hubs releasing vacuum. Both of my trucks do that and it is normal.

 

Testosterone overflow...

 

LOL!!!!

 

Mine does it as well. I think it's normal.