What is the cause of the Buick Regal's failure to start?

[Marc]

The first reason is battery damage. The second reason is an abnormal air-fuel mixture ratio in the car, which is also the most common and typical cause. In this case, the engine usually cranks normally but fails to start. This phenomenon generally occurs when the throttle valve, intake valve, or idle speed control valve is too dirty. Below is a detailed introduction to the faults causing the Buick Regal's failure to start: 1. If the valves are too dirty, gasoline will be sprayed onto the back of the valves and absorbed by carbon deposits, preventing the car from starting. Generally, cleaning can solve this problem. 2. Unstable power supply voltage in the ignition system. In winter, the engine pressure is high, including insufficient battery power, leading to inadequate voltage in the entire ignition system. 3. A dead battery, faulty spark plugs, and starting circuit malfunctions are also among the reasons why the car cannot start.