What Are the Causes of Difficult Cold Starts?

[DiAllison]

Here are the reasons for difficult cold starts: 1. Poor fuel quality: Inferior fuel quality leads to poor fuel volatility, especially in winter when temperatures are low. During cold starts, the engine block temperature is low, making it difficult for the fuel to atomize. The fuel injected into the cylinders cannot mix sufficiently with air, resulting in difficulty starting. 2. Excessive carbon buildup on valves and intake pipes: The lower the temperature, the more fuel is required for a cold start. Carbon deposits significantly affect whether a cold start proceeds smoothly. 3. Delayed spark plug replacement: Cold starts require higher ignition energy. After a certain mileage, the electrode gap of spark plugs increases, and beyond a certain point, they can no longer properly ignite the air-fuel mixture in the cylinders, making it very difficult to start the car.