What is the reason why the car is difficult to ignite?

The ignition is not smooth, which often happens when the temperature is low. Many cars are used well at ordinary times, and these faults occur when the temperature is low. It used to take two or three seconds to catch fire, but now it takes five or six seconds. You could have called once. Now it takes several times to hit, and some can't hit directly. Sometimes it is not easy to find the reasons for these situations, because it is not easy to light a fire in the morning and then return to normal. When you drive to the 4S shop for inspection, there will be no trouble. At this time, the ignition is normal, and there is no fault code detected by the computer. If you want to repair it, you can only guess, starting from the most possible place, or putting the car in the repair shop and letting the maintenance technician light it the next morning, which is more troublesome. Therefore, if there is a phenomenon of poor ignition, the owner had better describe the fault in detail and eliminate some reasons himself. Let's talk about the possible reasons today and how to make a preliminary judgment.

There are two most likely reasons, one is that the car has carbon deposits, and the other is that the battery has insufficient storage capacity and its life is coming soon. Let's talk about carbon deposition first. There is a large amount of carbon deposit in the cylinder and intake valve. During ignition, carbon deposit will absorb a part of gasoline vapor, which will reduce the concentration of mixed gas and make it difficult to start. Keep the ignition on, spray more oil, or hit it two or three times. When the vehicle is cold-started, it needs a rich mixture. If it is in a rich state, it is more beneficial for the vehicle to spray more gasoline when starting.

If there is carbon deposit at the throttle, the carbon deposit will block some intake passages, which will lead to insufficient intake and insufficient fuel injection, and also lead to poor ignition. How should we judge whether it is caused by carbon deposition? First consider the number of kilometers. If it is difficult to strike a fire after thousands of kilometers, it is generally not caused by carbon deposition and can be ruled out. If it is more than 30,000 to 50,000 kilometers and it has not been cleaned, the problem of carbon deposition should be considered. First, eliminate the carbon deposit on the accelerator, and step on the accelerator repeatedly while lighting the fire. If the engine starts smoothly, the throttle is more likely to deposit carbon. If the fault remains, it will still be called several times to see the running state of the engine after the fire. If the vibration is serious, the exhaust pipe suddenly sounds, which is caused by more carbon deposition in the cylinder. If it runs smoothly after the fire, find other reasons.

Let's talk about batteries. The storage capacity of the battery is closely related to the temperature. The lower the temperature, the worse the performance of the battery. Many cars' batteries are well used in summer, but they won't catch fire in winter, indicating that the battery life is up and needs to be replaced. When the storage capacity is low, the starter will not run and the ignition will not be smooth. In fact, it is easier to judge whether the starter is running or not, and it is easier to hear. The voice is very different from usual. Usually it will click twice and then click. At this time, the voice is low and the speed is slow, and the driver can feel it.

The reasons related to temperature are not easy to start, and the above two situations are more common. Experienced drivers can roughly judge the cause of the fault by themselves, and it is easier to maintain. Of course, there are other reasons for the poor start, such as the spark plug needs to be replaced, the gasoline pump is broken, the pressure cannot be maintained, the nozzle is broken, and some sensors are broken. These have little to do with temperature. No matter whether the temperature is high or low, their failure will lead to difficulties in starting. Because it happens when the temperature is low, look for the most likely one first. Generally, carbon deposits and battery problems have the highest probability and are the easiest to judge and eliminate. If there is a bad beginning, it will be easier to rule out these two items first, and then find other reasons and rule them out one by one.