What are the reasons why the engine sometimes fails to start?
2 Answers
The reasons why the engine sometimes fails to start are: 1. The spark plug does not produce a spark or the spark is too weak, thus failing to ignite the fuel-air mixture in the cylinder, causing the engine to fail to start; 2. The battery voltage is too low; 3. The coolant temperature sensor is short-circuited; 4. The fuel filter is clogged; 5. The fuel pump relay contacts are corroded or the solder joints have poor contact. The car engine is the device that provides power to the car, serving as the heart of the car, determining its power, fuel economy, stability, and environmental performance. Depending on the power source, car engines can be divided into diesel engines, gasoline engines, electric vehicle motors, and hybrids. Common gasoline and diesel engines belong to reciprocating piston internal combustion engines, which convert the chemical energy of fuel into the mechanical energy of piston movement and output power externally.
I often encounter this situation when repairing cars. Sometimes the engine won't start, and in many cases, it's a battery issue, especially with older cars where the battery is aging or the connections are loose. Cold weather makes these problems more likely to occur. Additionally, if the starter is worn out, it may make a clicking sound when turning; if the spark plugs don't produce sparks, fuel won't enter the cylinders; or the fuel pump in the tank might be faulty, causing poor fuel delivery. Poor contact with the key or the anti-theft system is also a common cause. I once had a customer whose car wouldn't start because the key chip was dirty. Don't panic when this happens. First, check if the battery indicator light is on. If it's normal, then inspect other components. If all else fails, take it to a professional repair shop for diagnosis to avoid compromising travel safety.
