Front passenger side noise

Glad to see you back.I have problem with a noise (hummm) coming from the right front passenger side.When I cruise at a regular speed(40-45) a humm starts.If I lift gently my foot off the gas it stops.Above that speed wind noise would drown the noise.So I am not sure if it does it above that.If I accelerate it stops.From a stop if I accelerate and turn right it starts.When I straighten it stops.If I turn without accelerating,foot off the gas, it does not do it.My mechanic has no idea.Checked bearings and they look tight.It has been like this for 3,000 miles.Bearings I think would constantly make a noise and get worse.Some Have mentioned a fuel related problem.Any idea would be appreciated.It is a 2000 Boxster.Thanks

only guesses....EVAP ,r/s mirror....try it with the fuel door open