Why is it harder to start a truck in winter?

1. This is most likely caused by carbon deposits inside the  throttle valve. The amount of air intake in a truck is controlled by the throttle valve, which has a flap that opens when the accelerator is pressed. The deeper the accelerator is pressed, the wider the flap opens, allowing more air to enter. At idle speed, when the accelerator is not pressed, the flap does not completely block the air intake, but leaves a gap, through which air enters during idle speed.

If carbon deposits form on the throttle valve, they will preferentially adhere to this gap. As the carbon deposits grow, they will block the gap, which in turn reduces intake air volume. With reduced intake air volume, fuel injection also decreases, resulting in insufficient fuel and gas, and, of course, poor combustion. For example, if five units of gasoline were required to burn before, now only one unit is required, and the car will definitely not ignite.

 In this case, if you repeatedly try to ignite the engine, the sprayed fuel will adhere to the cylinder wall, the carbon deposits in the cylinder, and the spark plug, causing the gasoline to accumulate and leaving too much gasoline in the cylinder. Ultimately, even if the intake volume is normal, the mixture concentration will be too high to ignite easily.

How to solve this problem? Simply step on the accelerator to ignite the engine. Because when you step on the accelerator, the throttle valve will open, the intake volume will increase significantly, and the amount of fuel injected will also increase, making ignition very easy.

2. Poor gasoline atomization. Gasoline burns in the cylinder. It must be atomized and turned into fine gasoline vapor. Only after mixing with air can it burn normally. The lower the temperature, the worse the atomization effect. Just like the evaporation of water, a basin of water evaporates in a few days in the summer, but the water remains in the winter for several months. Therefore, in places with extremely cold weather, poor atomization will make it difficult to ignite. The solution is still to repeatedly step on the accelerator to ignite, so as to increase the intake volume and the amount of fuel injected. 

3. Reduced battery performance. Temperature significantly impacts battery performance. In low-temperature environments, the battery's capacity decreases, reducing its output current. The optimal operating temperature for batteries is approximately 25°C. At this temperature, the battery's capacity and charge/discharge efficiency are both optimized. Below 0°C, the battery's stored charge decreases by up to 30%. Just like new energy electric vehicles, their range in winter is reduced by at least 20%, and some vehicles can even reach even lower limits.

If the battery is low on power, the output current will be reduced, making starting difficult and the engine will run slowly, making it hard to start the car. In this case, a new battery needs to be replaced. Although the battery may still work in the summer, its lifespan is basically over and it needs to be replaced to ensure normal use in winter.