What are the reasons for difficult engine ignition?

[RyleeLee]

Engine ignition difficulties may be caused by: 1. Ignition system failure or incorrect ignition timing; 2. Fuel injector malfunction or poor performance, cold start injector not spraying, low fuel injection pressure, clogged or leaking injectors, poor fuel injection control signals; 3. Fuel pump failure; 4. Air intake system leaks; 5. Low cylinder pressure. An engine is a machine that converts other forms of energy into mechanical energy, first developed in England. It can refer to either the power generation device or the entire machine including the power unit. Engine types include internal combustion engines, external combustion engines, electric motors, etc.