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If you fill up your car on a gas station and suddenly feel the bad smell of gas in your car,
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in 80% of cases, this will be because some gas was spilled. So you have some gas on the body part of
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your car, you have some gas on the wheel, and after maybe one or two hours, you will not feel
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any smell because it will just evaporate. But in some cases, if you keep feeling the smell,
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there may be a problem. And actually, there are two problems. And first of all, it can be the
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problem with the filler neck. So the filler neck may have a hole in it. The filler necks in older
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cars were made of metal, and of course, after some time, they started getting some rust, and
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if they get some rust, they can have some holes. And through these holes, you can get some gas out
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of the system, and actually, it's very bad for the evaporative system because the brain of your
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car will feel that some air escapes from the fuel tank, and it will start going crazy. But the worst
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thing is that through that hole in the filler neck, you will get some fuel spilling out every
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time you buy fuel. It's pretty common for old GM cars, and actually, I had this problem in one of
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my old GM cars. The filler neck gets bad where it connects to the fuel tank, and in this place,
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it can rust, and some fuel will get out of the tank when the tank is full. So if you experience
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this, one of the possible ways to check this is not buying the full tank of fuel several times
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and checking if you still feel this smell. This gets especially bad when you top up the fuel. So
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when a gas station nozzle stops fueling your car and you still try to add even more fuel,
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all this fuel will just escape through that hole because the filler neck is higher than the tank.
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In this case, the only possible solution is to replace the filler neck and to make some welding,
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but it's not a DIY task. Absolutely. You shouldn't even try doing any welding with the fuel tank
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on your own because it's really dangerous. And there is the second problem. The second problem
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is the EVAP system. So EVAP system or evaporative system, this is actually the breather of your fuel
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tank. So all air that comes in the fuel tank to compensate for the fuel that you use or that comes
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out of the fuel tank when the fuel gets a little bigger when it's hot, all this air comes through
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the evaporative system. This is the charcoal canister, kind of a filter that filters the air
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that comes out of the fuel tank. And some of this air goes into the engine through the purge valve,
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and some of this air just escapes the charcoal canister through the breather. So the problem is
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that in older cars, in vehicles that go more than 200,000 miles, this evaporative system may not be
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really in a good condition. So some fuel can get into the evaporative system, and after some time,
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you will feel this smell of gas in your car because the charcoal canister can't filter
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this air anymore, and it will escape through the breather of the charcoal canister. And you will
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feel the smell at all times. But it's not only when you add some fuel in your fuel tank. This
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will be rather a constant fuel smell. If you can't locate this problem, you shouldn't ignore this
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because if some fuel goes out of your tank and you don't know this, you have a leak. This fuel
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actually may cause fire. So the first thing to do is to go to the dealership or to any repair shop,
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have the car inspected, and see what's wrong with this fuel system and where you have this leak.
