What Causes an Engine with Spark and Fuel to Fail to Start?

[CharlesMarie]

An engine with spark and fuel failing to start can be caused by issues with the spark plugs, a depleted battery, or blocked fuel flow, among other reasons. Issues with the spark plugs: Since spark plugs are a critical component of the car's ignition system, and the ignition system is crucial for engine operation, the performance of the spark plugs directly affects the vehicle's overall working performance and efficiency. Depleted battery: Low temperatures in winter or forgetting to turn off certain electrical devices can prevent the vehicle from starting. Especially during winter, frequent short trips at low speeds can cause the battery voltage to drop below the rated value, making it difficult to start or operate normally. Blocked fuel flow: This situation often occurs on extremely cold mornings due to long-term dirt accumulation in the fuel lines. When temperatures are very low, water and debris can mix and block the fuel lines, resulting in a failure to start.