1, throttle and air flow meter have too much carbon, and they are still easy to get dirty. Nowadays, most cars are electronic throttles, and a little carbon deposition may affect them. Too much carbon deposition in the throttle will cause the valve to jam when filling, the power will drop seriously and the idle speed will be unstable.

2, cylinder combustion chamber, piston carbon deposition is too much, cylinder combustion chamber carbon deposition is too much, it will have a certain adsorption effect on gasoline, so the ignition time will be extended a little. In addition, too much carbon deposit will be formed on the valve and piston ring, which indirectly leads to insufficient cylinder pressure, and the cold car is easy to idle and unstable, but it is good to warm the car.

Other matters needing attention in winter car use:

1, it is not advisable to warm the car at idle speed in place, because the fuel consumption of waiting at idle speed for 3 minutes is equivalent to driving at a speed of 60 kilometers per hour 1 kilometer. Secondly, because the temperature is not enough when idling, the three-way catalyst needs to convert more substances, and the three-way catalyst will also be damaged due to the increased burden.

2. Selection of engine oil

When changing oil in winter, we must pay attention to choosing the appropriate viscosity. Different viscosity grades are suitable for different ambient temperatures. If you choose it improperly, it will easily lead to problems such as difficulty or even failure to start the automobile engine. Improper engine oil will increase the working resistance of the engine, aggravate the wear of mechanical parts and increase fuel consumption.