What Causes the Smell of Gasoline During a Cold Car Start?

[VonMicah]

Car cold start has the smell of gasoline is due to an oil leak somewhere or a faulty fuel injector. If the fuel injector malfunctions, gasoline cannot atomize during a cold start, leading to incomplete combustion and a noticeable gasoline smell. During winter cold starts, because the weather is cold and ignition is difficult, some gasoline may be expelled through the exhaust pipe, resulting in a gasoline odor. Sometimes, after the engine is turned off, some unburned gasoline can also produce a gasoline smell. A cold start refers to starting the engine when the coolant temperature is low, typically after the car hasn't been used for a long time or after overnight parking. If the vehicle's performance is poor, cold starts may be more difficult.