What Are the Reasons for Difficult Cold Starts?
2 Answers
Difficult cold starts can be attributed to the following reasons: 1. Engine oil fluidity: The fluidity of engine oil is a significant factor affecting cold starts, especially in winter when reduced oil fluidity increases friction resistance during cold starts. It is recommended that car owners promptly change the oil grade; 2. Car battery: The charging and discharging performance of a car battery declines in low-temperature environments. When the battery cannot supply enough power to meet the starter's demand, the car becomes difficult to start; 3. Carbon deposits in the car: Carbon deposits can accumulate in various parts of the car, including the throttle valve, fuel injector, and spark plugs. Cold starts are relatively more challenging, and with the already low surrounding temperatures in winter, blockages in the throttle valve or fuel injector can further reduce gasoline atomization, affecting the engine's normal startup.
I drive quite a lot and have encountered the issue of difficult cold starts several times, mainly due to battery and engine oil problems. In cold weather, the battery may not have enough power because low temperatures affect its performance, making it hard to start after sitting overnight. If you only hear a clicking sound when trying to start the engine without it turning over, it's likely time to replace the battery. Engine oil is another factor—it thickens in winter, increasing the engine's rotational resistance and friction, making starts more difficult. Additionally, if the oil viscosity doesn't match the local climate or the wrong type is chosen, cold starts can become harder. It's advisable to check the battery charge before cold weather sets in or switch to winter-grade engine oil. Regular vehicle maintenance is also important to prevent battery aging or oil-related issues from accumulating.
