80MPH my car starts to stink

[is250doll]

When I hit 75MPH + my car starts to stink, sometimes it smells like rotten eggs and other times it smells burnt. Any ideas what it could be? 

[13IS250C]

My guess would be the catalytic converter.   I would have it checked out immediately.    If it is clogged, it would rob you of HP and gas mileage.

 

[sadclown]

From where do you smell it?

[KhoiKO]

Air filter? Ac filter? 

[Daniella]

I had the same issue my exhaust was a little rusted and the exhaust gas was leaking the smell was terrible 

[TrevC]

If the Cat is smelling then usually it is an ignition misfire causing the Cat to overheat and produce the sulphur smell

Excess oxygen levels can also cause the Cat to overheat so if there is a small leak in any part of the exhaust system upstream of the Cat or a major leak in the inlet manifold then this can also cause it

[FsportAWD350]

Yours 250 smell like rotten eggs once you go WOT is because your Engine burns your Carbon Buildup, its a good thing !