What Are the Reasons for Higher Engine RPM in Winter?

[AidenLee]

Higher engine RPM in winter is caused by reasons such as not warming up the car before driving, severe carbon buildup clogging the engine, or faults in the engine's intake system or piping. Not warming up the car before driving: It is necessary to warm up the car before driving. Generally, warming up for about half a minute is sufficient, and prolonged warming up is not required. Then, gradually accelerate to avoid damaging the car's engine. Severe carbon buildup clogging the engine: This could be due to a dirty throttle body or excessive carbon deposits on the fuel injectors. When there is too much carbon buildup inside the engine, the gasoline sprayed by the cold start injector can be largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts and making it difficult to start. In such cases, the carbon deposits should be cleaned promptly. Faults in the engine's intake system or piping: It is recommended to check the intake system or piping; inspect the throttle body (including sensors); check the coolant temperature sensor; examine the fuel injectors and ignition system; and inspect the accelerator pedal and its sensor.