Why is the car lacking power and consuming more fuel?

[Tyler]

The reasons for a car lacking power and consuming more fuel include: Excessive engine oil: This situation increases the operational resistance of the engine, making it difficult to raise the RPM no matter how much the accelerator is pressed, and the engine will also lack power. Insufficient engine cylinder pressure: When the piston is at the end of the compression stroke, the spark plug ignites, and the air-fuel mixture burns to push the piston downward. If the cylinder pressure is insufficient and the sealing is poor, the burning mixture cannot fully push the piston, leading to increased engine noise and reduced power. Causes of insufficient cylinder pressure may include misaligned piston rings, broken piston rings, leaking cylinder head gaskets, or excessive clearance between the piston and cylinder wall. Faulty fuel injector: If the fuel injector is faulty or the fuel injection pressure is insufficient, the gasoline will not atomize completely, preventing it from fully mixing with air. This can also result in increased engine noise, reduced power, and higher fuel consumption.