sounds like an exhaust leak, or a fuel leak. that depends on the smell.
It has a clogged fuel filter. Very cheap and easy to either do yourself or have it done.
your vehicle may smell like antifreeze while driving because it is overheating
Sounds like it could be vapor locking. Try putting a few wooden clothes pins on fuel line
Have your fuel filter checked first. If that doesn't solve your problem, then have your catalytic convertor checked.
No, it smells like naptha.
Check your fuel pump and fuel injectors. Have a fuel pressure and flow test done.
look for a leaky fuel line
Car exhaust can smell like rotten eggs when the fuel has a lot of sulphur in it.
Perhaps a faulty fuel pump or clogged fuel filter
You should never smell fuel from a fuel injected vehicle. Fuel leaks can be dangerous and should be repaired as quickly as possible.
Sounds to me like HOT exhaust cooling down.