Excuse me, when the temperature is cold in winter, what's wrong with starting the car brake and not stepping on it? I think I'm stuck in an air current. If I heat the car for a while, I can step on th

Excuse me, when the temperature is cold in winter, what's wrong with starting the car brake and not stepping on it? I think I'm stuck in an air current. If I heat the car for a while, I can step on the gas pedal. There may be the following reasons why the car can't step on the brakes when it is cold started:

1. Brake pads are made of metal and are hard after cooling. When the car is cold, the contact surface between the brake pad and the brake disc is relatively hard, and the friction between the hard objects will be relatively small. After hot car, the material changes with the increase of braking temperature, so the braking effect returns to normal. In this case, the brake pads made of nonmetallic materials can be replaced.

2. The quality of brake fluid is unqualified, with high viscosity at low temperature and large resistance.

3. It is the gap fault of the brake booster, which may also lead to such problems.

4. The computer data of 4.ABS pump is incorrect, resulting in a large difference in output oil pressure.

Extended data:

Matters needing attention in winter car use:

1. Warm up the car before driving.

After a cold night, the oil has flowed into the oil pan, but after the hot car, the oil can't be delivered to the piston that needs lubrication most immediately through the oil pump, so it needs to be warmed up. The preheating time should not exceed 1 min, preferably between 30 seconds and 1 min. When driving on the road, you should step on the accelerator slowly, and you can drive normally after the water temperature rises.

2, timely replacement of glass water in winter.

After winter, the weather is getting colder and colder, and the lowest temperature in some parts of the north has reached below zero degrees Celsius, so it is necessary to replace the antifreeze glass water in time. The antifreeze glass water should also be selected below the local minimum temperature, otherwise the glass kettle and pipeline will freeze and crack.