Gas odor when at stops sign or parking in garage

White smoke is water vapor and in this cold climate it is normal. Strong gas smell is not normal although you may smell some while engine is warming up. Bad cat converter can produce smells, but usually more like rotten eggs. If engine is running rough and seems rich, check coolant temp sensor. Bad converter can cause stalling too. Otherwise, idle speed is controlled by idle air contol motor which can get dirty and stick. Any codes set?

first of course is to look for leaks second, get the emissions and recirculation canister and related stuff looked at..be careful here because this could ultimately explode in the garage..park it outide if nessecary...and dont overfill the cars' tank,, too many people do this and get fuel inside all the overflow tubes..not a good thing.. fill until the hose turns off once and stop....good luck...

No service engine light? A loose gas cap will set a light.
You may want to inspect your fuel filler neck and anything close. For a long while its not uncommon for a person to report the fuel odor issue and have it be where some low life cut a filler neck or puntured a tank to steal fuel. But if that were the case there would usually be a service engine or gas cap light as the systems now days monitor pressures so they can detect leaks in the Evap system.

When you mention a smell though under the hood, do you think the smell could be exhaust? I have seen those manifolds crack. or maybe just a leak from a gasket or exhaust donut.

Check the fuel pressure regulator.Pull the vacuum hose off of the fuel regulator and check for fuel inside hose.If you find fuel replace regulator.Also check map sensor for fuel.

we call these vehicles exploders.. lol
sounds like a fuel delivery issue, does it throw a check engine warning?

If the gas odor is coming from the engine, than the problem is most likely a cracked or poorly seated fuel injector.

do u have a check engine light on? do u overfill the tank? which is to say when the filler nozzle clicks off do u still try to put more fuel in? in any event u most likely have a overloaded carbon canister, pull the canister out and check it for gasoline saturation, the carbon canister is located under the car in a tray near the fuel tank.

A gasoline leak on or around the engine. Bad mileage lately? Check fuel lines and where parked to see if anygasoline leak.  

the first thing to do is look under the car at the plastic canister the vaper recovery system it is in the rear some times it is coverd by a sheild the vacuume hoses are bad if you smell gas and that will turn the light on it works off a pressure senser on the tank check all the hoses

you may have oil leaking on exhaust.