What Causes a Car to Fail to Start When Warm?

[VanRachel]

Reasons why a car fails to start when warm: 1. Fuel injector leakage; 2. Damaged carbon canister solenoid valve, causing an overly rich air-fuel mixture; 3. Poor fuel quality that easily evaporates, resulting in overly lean fuel vapor from the injector; 4. Faulty intake air temperature sensor; 5. Excessive carbon buildup on intake valves, throttle body, and pistons; 6. Aging ignition coils with leaking wires. Solutions for a car failing to start when warm: 1. Warm up the car for only 1 minute, no need to wait 5 to 6 minutes; 2. Engine oil becomes thicker and less fluid at low temperatures; 3. Avoid rapid acceleration while the engine is warming up; 4. Choosing engine oil with lower low-temperature viscosity can help the engine reach operating temperature faster.