What are the reasons for difficulty in starting a hot engine?

[LaEmerson]

The reasons for difficulty in starting a hot engine are: 1. Damaged carbon canister solenoid valve; 2. Poor quality gasoline; 3. Faulty intake air temperature sensor; 4. Excessive carbon buildup on intake valves, throttle valves, and pistons; 5. Low vehicle battery power. The function of the engine is: to convert the thermal energy of gasoline into mechanical energy by burning and expanding gas in a sealed cylinder, thereby pushing the piston to perform work. Engine maintenance methods: 1. Use qualified engine oil; 2. Use qualified coolant; 3. Regularly clean the radiator scale; 4. Regularly remove carbon deposits from the engine; 5. Replace the vehicle's air filter, oil filter, and fuel filter on time; 6. Check if the spark plugs are damaged.