yes
The fumes are most likely coming from an exhaust leak. The leak could be at the converter, or somewhere else in the exhaust system.
Underneath the vehicle connected to the exhaust pipe coming from the engine. If you look under the vehicle you will see it.
Water condensation coming from the exhaust is normal when the vehicle has been sitting in a wet area, but should stop once it is warmed up. Water from the exhaust after it is warmed up and white smoke from the exhaust is an indication of a blown head gasket.
A Catalytic Converter is used to clean the fumes of the exhaust emmisions coming out of a motorised vehicle.
Tough question without knowing more info. But, if you are talking about fluid coming out the end of the exhaust pipe when the car is running............its not fuel, its water!
You are running too rich. the mixture of fuel and air has too much fuel in it,
if there is white smoke ur vehicle is either burning oil or it is moisture in the gas chamber
engine is burning oil could be valve seals or piston rings
Crawl under the vehicle and look up. You will see the converter connected to the exhaust pipe coming from the engine.
You may have bad head gaskets when,you are losing engine coolant and you don't see any leaks. you see a white smoke (steam) coming from the exhaust pipe. you have a sweet smell coming from the exhaust pipe. you see air bubbles in the radiator coolant with the radiator cap off and engine running. you see a milky substance collecting on the engines dip stick and/or engines oil cap..
If it stops after a minute or two, it was condensation. If it continues the whole time the engine is running, it's smoke.