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smell gas in the cabin
Kenny, Fuel line is probably leaking, would have checked immediately by a qualified tech. This could be extremely dangerous if fuel is spraying/leaking on hot surface such as exhaust.
My 2004 Mazda 6 had a similar problem. It smelled like gas inside the car and had code # P0456. I found that the PCV line was pinched. The line was not an Original Equipment. I replaced the line and the PCV valve. So far so good...
On my 2004 Chrysler Pacifica I noticed a gas smell inside the cabin. I could also smell the gas very strong inside the engine bay when the car was running. It turned out to be a plastic line that connects between the fuel line from the tank, and the fuel rail which was leaking fuel. This line was located on the right side of the engine bay under the air cleaner. This was right next to the HVAC system, which was why I was smelling it in the cab of the car so much.
Usually, what you smell inside the car is coming thru the vent from the engine compartment. So it could be a leak around the engine or the vapor canister. Its possible the canister gets overloaded from time to time when the computer vents the gas tank to the canister. A very small leak can be a very strong smell inside the car.
is there a leak in your fuel line, or possibly your fuel filter, if you see raw gas leaking, then it is dangerous for you tio continue to drive it, it only takes one spark to ignite it, however, if the smell is just your car burning rich and the exhaust has holes in it, it will smell up the inside of your car. And yes if your carb. is burning too rich then it needs adjusted. Wasting your fuel, and overloading your engine. I hope some of this was helpfull.
don't over fill the tank, when it clicks off thats it!! any check engine light? I had fuel smell, and the O-Ring was leaking when I changed the fuel pump. Top of the fuel tank, was leaking only on a full tank, Also evap, pump and hoses do crack and leak but it will show, in a check engine light usually
check the fuel line hose near the fuel regulator for wear as they tend to leak or corrode causing a gas smell inside the car. My 2000 Kia Sportage just had the same problem with the gas smell inside the car.