What are the symptoms of insufficient cylinder pressure in a car engine?

[LePeter]

Symptoms of insufficient cylinder pressure in a car engine: It can cause difficulties in engine starting, insufficient power, vibration during operation, increased fuel consumption, and failure to meet exhaust emission standards. Normally, the cylinder pressure measured by the starter should be above 8 kg. Causes of insufficient cylinder pressure in the engine: 1. Severe wear of piston rings, leading to reduced sealing effectiveness; 2. Scratches, unevenness, or abnormal wear on the cylinder walls; 3. Poor sealing of the valve seat or spark plug seat; 4. Damage to the cylinder head gasket. The function of the cylinder head gasket is to keep adjacent cylinders independent of each other. If the cylinder head gasket is damaged, the two cylinders may become connected, naturally resulting in insufficient cylinder pressure. Additionally, damage to the cylinder head gasket can also lead to the mixing of engine oil and coolant, which may then enter the cylinder and burn.