Guys, I started hearing a strange fan-like noise coming from underneath. I think it might be coming from the driver side fuel tank. I say that because I can feel some vibration when i put my hand on the fuel tank. The sound from a few steps back sounds like white noise from an FM radio station. Up close, it sounds kind of like a fan. I've attached a youtube video. Can anyone identify what this sound is and why it's still running an hour after I've already turned off my engine?
Thanks in advance.