What Causes the Car to Fail to Start After Shutting Off?

1 Answers
LaEmmanuel
07/29/25 5:42pm
Reasons why a hot engine fails to start after shutting off: 1. Carbon Deposits: At high temperatures, carbon deposits have a strong adsorption effect on fuel. Excessive carbon deposits on the piston, throttle, and intake pipe can absorb a portion of the fuel, leading to a lean air-fuel mixture and affecting engine startup. 2. Faulty Coolant Temperature Sensor and Intake Air Temperature Sensor: If these two sensors are damaged, they cannot provide accurate temperature signals. 3. Fuel System Malfunction: When the car is hot, the temperature is very high. If low-quality gasoline is used, it can cause the gasoline to evaporate, resulting in an overly lean mixture. Additionally, poor fuel pump operation or fuel injector leakage can also make it difficult to start.
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