my 2001 lexus is300 smells like fuel or rotten eggs when i accelerat

You may have an exhaust leak, or something that burns when the engine gets hot enough, if your over revving it you may have valve float were the valves hang open so fuel is escaping the cylinders

l used to get this, l was told the egg smell is sulphur in the fuel but fuels nowadays (in the UK) are low sulphur so you should not get it that bad. As for the fuel smell, do you get it all the time or only when you just started it and are driving till it warms up? most cars run rich when they're cold.

Rotten eggs smell is a sign of your catalytic converter failing, this should be covered under Lexus warranty unless you have custom exhaust or serious engine mods.