Getting odd exhuast smells "no beans involved" I find that when driving especially on PA turnpike between posted speed and well___. There seems to be a strong egg smell in car worse if I open window. Now I thought it may have been someone in front exhaust coming in so I have driven with re-circulating button on to. Even with vent closed windows up and no one around it still happens. It's a bit annoying any Serious thoughts please on this issue. Thanks ahead of time