you have gasoline leaking into the engine when stopped could be a faulty injector
sulfur allyl sulfate smells like onion.
Cyanide gas
make be there is a gas leak
because you spilled gas in it
why you get lightheaded when i pass gas? simply because it smells like a$$!
Dude, it's gas. Gas is a chemical. There you go.
It smells terrible it smells like old gas from the car when people smoke their teeth get ruined
Fuel pump
Varnish, or in other words it does not smell like gas, it smells almost burnt
Thunder smells like ozone gas. It is because ozone gas is produced during thunder.
ammonia
hydrogen sulfide.