Unable to start when hot but starts after cooling down?

[OKylie]

Unable to start when hot but starts after cooling down may be caused by fuel injector leakage, damaged carbon canister solenoid valve, or poor fuel quality. Here are the specific explanations for this issue: 1. Fuel injector leakage: While normal fuel injection is expected, leakage constitutes additional fuel supply. The more severe the injector leakage, the richer the air-fuel mixture becomes, leading to difficulty starting when hot. 2. Damaged carbon canister solenoid valve: During hot starts, fuel atomization is normally sufficient without additional vapor supply. If the carbon canister continues supplying vapor to the intake, it creates an over-rich mixture, making starting difficult. 3. Poor fuel quality: After hot shutdown, the engine compartment remains quite hot. If the fuel is highly volatile, it can form excessive vapor pressure in the fuel rail. When this pressure exceeds the fuel system's pressure, vapor lock occurs, causing excessively lean fuel vapor injection and resulting in starting difficulties.