What are the reasons for difficult cold starts in car engines?
2 Answers
There are several reasons for difficult cold starts in car engines: 1. The cold start injector is clogged with gum deposits, affecting the fuel atomization quality, which causes the cold start injector to fail and not work properly; 2. The thermal switch is short-circuited (contacts normally closed) or open-circuited (normally open). If the contacts are normally closed, the cold start injector will always be in a non-working state; 3. The coolant temperature sensor is faulty, leading to incorrect information transmission; 4. Severe carbon deposits in the intake tract and combustion chamber. The car engine is the device that provides power to the car, acting as the heart of the car, determining its power, fuel economy, stability, and environmental friendliness. Depending on the power source, car engines can be classified into diesel engines, gasoline engines, electric vehicle motors, and hybrids, among others.
I always have a headache when starting my car in winter, and there are many reasons for this. The battery loses power as it ages, making it difficult to start in cold weather. Spark plugs that have been used for a long time accumulate carbon deposits or become eroded, leading to unstable ignition and failure to start. The fuel pump may have insufficient pressure or the fuel injector may be clogged, causing poor fuel spray and an overly lean air-fuel mixture. A dirty air filter restricts airflow, affecting combustion. Engine oil becomes too thick in low temperatures, making piston movement difficult. Sensor issues, such as a faulty coolant temperature sensor, can cause the computer to misjudge the temperature and reduce fuel injection. Additionally, relay failures or a stuck starter can cause problems. Using low-quality gasoline or the wrong fuel can also exacerbate the issue. Prevention is key—regularly check the electrical system and fluids, replace old components, and warm up the car before starting in winter to significantly reduce trouble.
