What are the reasons for weak car starting?

[LeAurora]

The reasons for weak car starting are: 1. Excessive wear of cylinder liners, pistons, and rings due to prolonged use, leading to insufficient cylinder pressure, reduced efficiency, and weak engine performance, usually accompanied by blue smoke from burning engine oil; 2. Incorrect valve timing, resulting in abnormal operation; 3. Issues with the fuel system or electrical circuit; 4. Excessive carbon buildup in the intake manifold; 5. Carbon deposits or incorrect gap in spark plugs. Transmission clutch failure can cause weak car starting. The function of the clutch is to transmit and cut off the engine's power. Manual transmissions, dual-clutch transmissions, etc., use friction plate clutches. Over time, the friction plates wear severely, leading to slipping and subsequently causing weak car starting. Additionally, dirty or insufficient transmission fluid can also result in weak car starting.