
There are several reasons why a car may have difficulty starting: 1. Carbon buildup in the engine; 2. Weak spark plug ignition energy; 3. Insufficient fuel line low pressure; 4. Battery depletion. 1. Difficulty starting due to carbon buildup: This is often accompanied by slight shaking at idle. Cleaning the throttle body, intake manifold carbon deposits, and fuel injectors can resolve the issue. 2. Weak spark plug ignition energy: Some owners delay replacing spark plugs beyond the maintenance cycle to save money, which can severely reduce ignition energy and cause misfires. Many modern engines use direct fuel injection, which places higher demands on spark plugs. 3. Insufficient fuel line low pressure: Low fuel pressure in the system directly causes the engine to require a second ignition attempt. The reason is that the first attempt fails while the fuel system builds pressure, and the second attempt succeeds. Components to check include: fuel pressure regulator, fuel pump, fuel filter, and internal fuel lines. 4. Battery depletion: This is the most common issue when a car won't start, and owners often first suspect a dead battery. The solution is simple—just jump-start the car using another vehicle or battery.


