What causes a strong gasoline smell outside the car after parking?

2 Answers
KendraAnn
07/28/25 3:30pm
The reasons for a strong gasoline smell outside the car after parking are: 1. Engine oil leakage, spark plug oil leakage; 2. Poor fuel tank sealing, excessive air pressure in the fuel tank can easily push open the fuel pump sealing ring, and loose or cracked connections at the fuel tank's fuel outlet and return pipe interfaces; 3. Misfiring, where some cylinders in the engine stop working, unburned gasoline is expelled with the exhaust, resulting in a gasoline smell, reduced power, and increased fuel consumption. Solution: After the vehicle has been used for some time, some rubber seals age, causing engine oil to leak from the seals and drip onto the exhaust manifold. As the exhaust manifold heats up, the oil evaporates quickly, producing a burnt oil smell. Simply replacing the seals will resolve the issue.
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Hall
08/11/25 10:54pm
I've been driving for decades and often encounter strong gasoline smell outside the car after parking, which usually indicates a minor leak in the fuel system. Common causes include loose fuel tank caps or aging seals leading to gasoline vapor leakage; there's also the issue of clogged or damaged charcoal canisters, which are components that handle evaporation - when they fail, the smell becomes noticeable. Aging fuel lines or cracked connectors can also cause leaks. In hot weather, gasoline evaporates faster, making the odor more pronounced. This poses significant safety hazards, potentially leading to fires, so I recommend immediately checking for oil stains under the chassis and ensuring the fuel filler cap is tightly secured. If you're unsure, take your car to a professional repair shop for inspection as soon as possible - prevention is better than cure.
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