Buzzing noise with engine off

[94lude]

I drove my NSX for a short while today. For the last few hours, while sitting in the garage with engine off, its been making a weird buzzing noise from the engine compartment every 5 min at 2 second intervals. Any thoughts on the cause?

 

[jwmelvin]

Normal venting, I believe from fuel tank.

 

[94lude]

Normal venting, I believe from fuel tank.

Interesting... so it'll stop on its own eventually?

 

[jwmelvin]

As briank explains here, venting is inaccurate but the sound is related to the fuel-vapor containment system.
http://www.nsxprime.com/forum/showthread.php/182186-Help-Needed-Buzzing-sound!

See also:
http://www.nsxprime.com/forum/showt...uick-help-identifying-electric-whirring-sound