What Are the Reasons for Weak Car Starting?

[Eden]

Here are the main reasons for weak car starting: 1. The engine has been used for too long, and the cylinder liner, piston, and rings are severely worn, resulting in insufficient cylinder pressure and reduced efficiency, leading to weak engine performance. This situation is usually accompanied by blue smoke due to oil burning. 2. Incorrect valve timing, causing abnormal operation. 3. Fuel system failure leading to weak engine performance, which can also cause fuel pump failure, fuel line blockage, fuel filter clogging, carburetor failure, or injector damage. 4. Severe carbon buildup in the car engine can prevent the car from starting. Many factors, such as excessive water in gasoline, poor fuel quality, and poor sealing of the valve seat, can cause carbon buildup. Regular cleaning of engine carbon deposits and using higher-quality gasoline are recommended. 5. Spark plug carbon buildup or incorrect gap.