The problem of poor ignition in cars occurs more frequently when the temperature is low. Many cars are usually used well, and this malfunction occurs when the temperature is low. Normally, it takes two or three seconds to start the car, but now it takes five or six seconds to start. Usually, it can only start once, but now it takes several times to start. Some cars simply cannot start. It is not easy to find the cause of these situations because only the morning one was difficult to ignite, and then it returned to normal. Drive to the 4S store for inspection, and there will be no malfunction. At this time, the ignition is normal, and there is no fault code detected by the computer. If you want to repair, you can only rely on speculation and start repairing from the most likely place. Alternatively, you need to take the car to the repair shop and have the repair technician check it the next morning, which is quite troublesome. So if there is a problem with poor ignition, it is best for the car owner to provide a detailed description of the fault and eliminate some of the reasons themselves. Here, let's talk about the possible reasons and how can we make a preliminary judgment?

        
There are two possible reasons, one is that the car has accumulated carbon, and the other is that the battery storage capacity is insufficient and the lifespan is approaching. First of all, let's talk about the problem of carbon accumulation. There is a large amount of carbon accumulation in the cylinder and on the intake valve. When the ignition is triggered, the carbon accumulation will absorb some of the gasoline vapor, causing a decrease in the concentration of the mixture and making it difficult to start. Continue to ignite and spray more oil, or you can ignite it two or three times. When the vehicle starts cold, it needs a relatively rich mixture, and when it starts in a rich state, it injects more gasoline during startup, which is more beneficial for the vehicle.
        
 If there is carbon accumulation at the throttle valve, which blocks some of the intake channels, it will cause insufficient intake and fuel injection, which will also lead to poor ignition. How should we determine if it is caused by carbon deposition? Firstly, consider the number of kilometers traveled by the vehicle. If it is difficult to ignite after only a few thousand kilometers, it is generally not caused by carbon deposition and can be ruled out. If the vehicle has traveled 30000 to 50000 kilometers or even more and has not been cleaned, it is necessary to consider the issue of carbon deposition. First, eliminate carbon buildup on the throttle. When igniting, repeatedly press the accelerator while igniting. If the engine starts smoothly, the possibility of carbon buildup on the throttle is relatively high. If the fault persists, it has been activated several times before it is activated, and check the operating status of the engine after ignition. If the shaking is severe and the exhaust pipe makes a sudden sound, it is caused by excessive carbon accumulation in the cylinder. If it runs smoothly after ignition, then look for other reasons.

         
   Let me talk about the issue with batteries again. The battery's storage capacity is closely related to temperature, and the lower the temperature, the worse the battery's performance. Many cars use their batteries well in the summer, but in winter, they run out of power and cannot start. This is when the battery life is up and needs to be replaced. When the battery level is low, the starter will run weakly and the ignition will not be smooth during ignition. In fact, this is relatively easy to determine. When the starter is running, it is easy to tell if it is rotating vigorously. There is a significant difference from the usual sound, with a double click before hitting. At this point, the sound is low and the speed is slow, which the driver can feel.

        
The reasons for poor starting of vehicles related to temperature are the two common situations mentioned above. Experienced drivers can roughly determine the cause of the fault themselves and are also relatively easy to repair. Of course, there may also be other reasons for poor starting, such as the need to replace the spark plug, a malfunction in the gasoline pump, inability to maintain pressure, a problem with the fuel injector, and some sensors malfunctioning. The relationship between these and temperature is not very significant. Regardless of the temperature, their malfunction will cause difficulty in starting the vehicle. Because it occurs when the temperature is low, first search for the most likely one. Generally, carbon deposition and battery problems have the highest probability and are also the easiest to determine and eliminate. If it is difficult to start the vehicle, it will be easier to eliminate these two issues first, and then search for other reasons and eliminate them one by one.

From: WONDEE Autoparts 2023-8-28