What to Do When a Car Won't Start Due to Insufficient Cylinder Pressure?

[DelRemington]

Insufficient cylinder pressure is mainly caused by two reasons: aging piston rings or cylinder liners can lead to a reduced compression ratio, and improperly closed or burnt valves can also result in a decreased compression ratio. These are the primary causes. Other factors like leaking cylinder head gaskets or spark plugs are less likely. If the car won't start, consider the following possibilities: 1. Check the spark plugs: Since spark plugs are crucial to the car's ignition system, and the ignition system is key to engine operation, the performance of the spark plugs directly affects the vehicle's overall performance and efficiency. 2. Dead battery: Symptoms include the starter turning but not fast enough (lacking power), or the starter making a clicking sound without turning. Low temperatures in winter or forgetting to turn off certain electrical devices can prevent the car from starting, especially during long-term short-distance, low-speed usage in winter, which can cause the battery voltage to drop below the rated value, making it unable to start or run normally.