Is it normal to smell gasoline when the car starts?

First, the throttle valve and air flow meter have too much carbon deposit.

Throttle and airflow get dirty easily. Now most cars are electronic throttles, and a little carbon deposition will affect them. Too much carbon deposition in the throttle will lead to throttle jam, serious power drop and unstable idle speed. Dirty air flow meter leads to wrong air flow signal, and the intake determines the fuel injection quantity, which directly leads to inaccurate fuel injection, which not only increases fuel consumption, but also seriously lacks power.

Solution: Replace the air filter in time. It is recommended that 1 10,000 to 20,000 kilometers be directly replaced. In addition, if you drive in a windy and dusty environment, check the air filter every time you maintain it. If it doesn't work, it has to be replaced. Driving in a relatively clean environment can slightly extend the replacement cycle.

Second, the piston carbon deposition

Because the cylinder combustion leads to excessive carbon deposition on the piston, in fact, the cylinder has a certain adsorption effect on gasoline, but too much carbon deposition will make a lot of gasoline adhere to the valve and piston, resulting in insufficient high pressure of the automobile, thus increasing fuel consumption and producing a stronger gasoline smell.

Solution: hot car can solve it.

Third, the fuel tank leaks oil.

When starting a car in winter, there will be a very strong smell of gasoline, which may be an oil leak in the car fuel tank or oil circuit. The smell of gasoline caused by this situation is relatively rare, and it will not happen if there is no big collision in the general car.

Solution: Observe whether there are oil droplets in the parking area or nearby ground. If so, take the car to the repair shop for professional inspection and maintenance.

Fourth, the engine oil jumps into the cylinder chamber to participate in combustion.

Because the ignition point of engine oil and gasoline is different, the engine oil can't burn completely in the cylinder, and a small amount of engine oil will be discharged from the exhaust pipe, that is, blue smoke will be emitted.

Under normal circumstances, the oil should only lubricate the cylinder wall and piston in the oil gallery, but once the inner wall of the cylinder is seriously worn or the piston is seriously worn, the oil originally in the oil gallery may escape into the engine combustion chamber. In addition, engines with severely worn valves may also burn oil.

References:

People's Network-The idle speed of the cold car is unstable and the gasoline smells heavy! Do you know why?

References:

Phoenix. Com- the causes of seven kinds of odors in the car, let's identify them together.