Why does the car emit a gasoline smell when running?

[VanJake]

The reasons why the car emits a gasoline smell when running are: 1. Problems with the carbon canister or carbon canister solenoid valve; 2. Excessive carbon deposits inside the engine; 3. The gasoline vapor in the carbon canister accumulates more and more; 4. There is leakage in the fuel injector. Solutions for the car emitting a gasoline smell when running: 1. Stop immediately and inspect, as the presence of this gasoline smell is a dangerous signal, and the vehicle may catch fire; 2. Locate the source of the gasoline smell. Gasoline, also known as petrol, is a volatile and flammable liquid hydrocarbon mixture obtained from petroleum through distillation or cracking, mainly including organic compounds derived from crude oil distillation and various additives.

[IsaacMarie]

I remember when I was young and driving, the smell of gasoline when the engine started always made me nervous. Back then, I asked an experienced driver and learned that the reason was usually a minor issue with the fuel system, such as a loose fuel tank cap or aging fuel lines that had become loose, allowing gasoline vapors to escape. It could also be due to a failed fuel tank seal, a leak at the fuel pump pipe connection, or even a clogged fuel injector causing dripping. If there was any residual oil or gasoline in the engine compartment, it would also evaporate at high temperatures. Once, I neglected to fix it in time, and a small problem turned into a big one, costing me a lot of money to repair. Now, I regularly check the fuel system to ensure the cap is tight and the fuel lines are free of cracks. Safe driving is crucial, so if I notice any unusual smells, I pull over to check or visit a professional repair shop.

[VanChristian]

When I smell gasoline after starting the car, my first reaction is to immediately check for leaks because this stuff is a major fire hazard! From experience, gasoline odors mostly originate from the fuel supply system—things like loose fuel line connections, leaking fuel filters, or clogged charcoal canisters causing vapor release. During cold starts, incomplete combustion can also produce strong fumes. Sometimes it's just a loose gas cap allowing fuel vapors to escape. In such cases, I roll down windows to ventilate and prevent gas accumulation, then inspect the engine bay for oil stains and tighten the gas cap—simple fixes. If that doesn't work, it's time to visit a shop for EVAP system inspection—professional repairs bring peace of mind. Develop regular maintenance habits, including cleaning fuel system components during car washes—prevention is key.

[KathrynDella]

The smell of gasoline when starting the car is often a sign of leakage. Common causes include loose or aged and cracked fuel tank pipe connections, leading to gasoline dripping and evaporating. Additionally, poor sealing of the fuel pump, worn and leaking fuel injectors, or excessive pressure in the fuel system can also cause fumes. The smell is more intense during cold starts due to lower combustion efficiency. Prompt inspection can prevent the issue from escalating. Key areas to check are under the engine for any oil traces and identifying the source of the smell.