hey guys,
So I got out of my truck tonight and as im walking away I hear a faint high pitch buzzing or humming sound. almost like a tire was leaking air. listened closer and it actually sounds more like the whine from a fuel pump. No idea why my fuel pump would be running right after I turned the truck off...? Just wondering if this has happened to anybody else? maybe the fpdm is going bad? could that cause the pump to stay on?
Thanks.

 

If you hear it again....put your ear by the gas cap....maybe the noise is coming from it....could be either a vacuum or pressure issue...