Why is there a gasoline smell when the car is just started?

[VonAlexandra]

The reasons for the gasoline smell when the car is just started: 1. Insufficient intake of the throttle valve; 2. Problems with the carbon canister or carbon canister solenoid valve, causing the mixture to be too rich; 3. Excessive carbon deposits inside the engine, resulting in poor mixture atomization; 4. Leakage from the fuel injector. The specific cause needs to be checked at a 4S shop or a professional auto repair shop. A strong gasoline smell when starting the car is usually normal if it disappears after the engine warms up, because the combustion effect is poor when the car is just started. During a cold start, the water temperature and the temperature of the exhaust pipe are low, and the mixture is relatively rich at this time, so some of the mixture cannot be fully burned and is discharged through the exhaust pipe, which causes the noticeable gasoline smell. This is a normal phenomenon.

[StBraxton]

I drive on highways all year round, and it's quite common to smell gasoline when starting the car. It's mostly because the engine has just started from a cold state, and the gasoline hasn't burned completely before moving, especially in cold weather or with older cars. Low engine temperature leads to poor combustion efficiency, making it easier for the gasoline smell to escape. Last winter, when I drove that old car, I smelled a strong odor every time I started it, but it dissipated after driving for a while. As long as it doesn't persist or become so pungent that it causes dizziness, it's generally fine. I recommend regularly checking if the spark plugs are worn out or if the air filter is clogged, as these can exacerbate the problem. Minor maintenance can prevent major issues.

[StRicardo]

When I first started driving, I was quite concerned about the gasoline smell during startup. Now I understand it's mainly caused by incomplete combustion when the engine is cold and not fully warmed up, leading to unburned gasoline escaping. Simply put, the gasoline isn't at optimal temperature when burning, so the smell is naturally stronger, but it disappears after a few minutes when the engine warms up. Usually, I make sure to check if there are any fuel leaks in the system, as overfilled engine oil can also cause odors. I also inspect the fuel lines near the battery to ensure they're properly sealed. If the smell has a sour or rotten odor, it might indicate a fuel system leak, which requires professional repair. Remember, occasional smells are normal, but don't ignore persistent warning signs.

[DeAdeline]

Smell of gasoline when starting the car? I've experienced it too. It's most likely just exhaust fumes from incomplete combustion when the engine is still cold. I used to worry about it as a beginner, but experienced mechanics explained it's normal - the smell dissipates after the engine warms up. The odor is more noticeable when parked in enclosed spaces, but usually harmless. However, if the smell is excessively strong or persists for several consecutive days, immediately check for possible fuel pump leaks. Early detection ensures safety.

[NadiaAnn]

The smell of fuel during startup should not be underestimated. Through extensive driving experience, I've learned it's caused by incomplete combustion in a cold engine, resulting in exhaust issues from gasoline evaporation. This odor is not only unpleasant but also contains harmful substances. Prolonged inhalation may harm your health, which is why I always emphasize starting the car in well-ventilated areas and keeping the garage door open. When encountering this smell, first ensure the air filter is clean and the spark plugs are functioning properly. If accompanied by blue smoke or reduced power, it's time for repairs. Maintaining your vehicle well also helps reduce such emissions, benefiting the environment.