Car start difficult and unstable idling? What exactly is the reason

The car does not start well and the engine idling is unstable ... I believe that many partners have encountered this situation, especially in winter. What are the reasons for these failures? What should I pay attention to during car maintenance?   First of all, it is difficult to start the vehicle The difficulty of starting the vehicle is particularly frequent in the winter, and a large part of it is caused by the battery's lack of power. When the battery power is low, the starter can obviously feel weak and weak, sometimes it can't be hit after the car is left for one night.  

Why is it easy for batteries to lose power in winter?

  Because the best use temperature of the battery is about 25 ℃, and the low temperature in winter will directly affect the capacity and performance of the battery, plus some of our inappropriate driving habits, such as using electrical equipment in the car for a long time after the flameout, Forgetting to turn off the headlights, etc., will more easily cause the battery to lose power.

    Under normal circumstances, the battery has a service life of 2 years, but the car is properly maintained and there is no pressure for 3-5 years of use. Therefore, we must use the electrical equipment in the car correctly. Turn off all electrical equipment in the car before turning off the flame. Do not park the car outside the car when it is parked in winter. When the headlights are weak, go to the car repair shop to check whether it is a battery. Caused by insufficient battery.

  Difficulties in starting the vehicle In addition to the battery factor, other factors such as the failure of the ignition coil and the failure to replace the spark plug in time can also cause the vehicle to start difficult. The spark plug is used for too long, the gap between the electrodes is too large, the spark energy generated is greatly weakened, and problems such as difficulty in starting will occur. The replacement cycle of spark plugs of different materials is also different. We replace the spark plugs in time according to the life cycle of the spark plugs during car maintenance. Another problem is that the failure of the ignition coil will also cause insufficient ignition capacity of the spark plug, which will cause problems such as difficulty in starting the car.

    Engine idling is unstable There are many reasons for the instability of the car's idle speed, and the editor lists a few common ones:  

1. Excessive accumulation of carbon sludge in the throttle valve and intake port causes the mixture to be too thick and too lean, which causes abnormal combustion and instability at idle speed.

 

2. Fuel injection nozzles are clogged, poorly sealed, and malfunctions cause unequal fuel injection, which may also cause unstable engine idle speed.

 

3. It is said that the problem of the spark plug will cause the car to start difficult. Similarly, the spark plug has not been replaced for a long time, and the electrode has been ablated or damaged.

 

4. The three-way catalyst is blocked or damaged, causing unstable idling.

 

5. Failures of various parts, such as: leakage of intake manifold or various valves, fuel pressure failure, low oil pressure, failure of ignition system, etc. will also cause unstable engine idling.

Therefore, during car maintenance, we must regularly check and clean the car throttles, fuel injectors, three yuan and other places that are easily clogged or oil sludge and carbon deposits, and replace all kinds of wearing parts in time to prevent damage to the engine and Impact on driving safety.