I have a 2003 v6 4runner limited and i noticed a noise that comes from under the vehicule when i accelarate with the front windows down. Its and annoying rattling sound that echoes only if you are in enclosed area (meaning local streets with cars around you) at the same time givings me a rotten egg smell if i accelarate to hard. I think its coming from the exhaust converter or exhaust gasket.I took to the dealer a test drove an another v6 it did the same thing, but you cant tell me that a new suv can sound like a diesel engines does in the winter. Anyone notice the same thing or has a solution for this thanx.