Why does the car emit a gasoline smell when running?

2 Answers
VanJake
09/05/25 8:08am
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.
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IsaacMarie
09/17/25 8:18am
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.
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