Why can't the car start when it has normal power?

[LolaMarie]

Here are the reasons why a car cannot start even with power: Wrong gear: When starting an automatic transmission car, the gear must be in P or N position. If it is in R or D position, the car cannot start. Clutch not engaged: Manual transmission cars cannot start if the clutch is not engaged. Excessive carbon buildup: Excessive carbon buildup in the vehicle can also prevent it from starting. Here are some extended solutions: Reduce carbon buildup: If the car cannot start due to excessive carbon buildup, driving at high speeds frequently can help reduce the buildup. Additionally, it's important to check if there is enough fuel. If the fuel level is insufficient, the car will not start easily. This situation is relatively easy to resolve—either seek help from nearby car owners or call for assistance. Repair needed: However, there are also cases where circuit malfunctions or electronic component failures occur, which usually happen suddenly. Common faults include blown fuses, open circuits in the high-voltage coil, open circuits in the low-voltage circuit, detached central ignition wires, leaking ignition heads, and damaged spark plugs. Electronic faults mainly refer to the failure of the central computer control panel. In such cases, repairs are necessary.

[PeterLynn]

I've also encountered situations where the car has power but won't start, mostly due to a faulty starter motor or poor electrical connections. The starter motor is responsible for turning the engine over. If you hear a clicking sound but the engine doesn't turn, it might be due to burnt internal contacts. In terms of wiring, loose or corroded connections between the ignition switch and the starter motor can interrupt the current. Additionally, if the spark plugs are too carbon-fouled or have excessive gap, they won't ignite the gasoline, preventing the car from starting. Fuel system blockages, like a failed fuel pump or no fuel supply, are also common, especially noticeable when the engine is cold. Faulty sensors, such as the crankshaft position sensor, can mislead the ECU (Engine Control Unit) and prevent ignition. I recommend first listening for sounds: if it's completely silent when attempting to start, it's likely an electrical issue; if there's cranking but no ignition, check the spark plugs and fuel pump. Avoid repeatedly trying to start the car to prevent damaging more components. Regular maintenance checks on these parts and using reliable fuel can prevent such issues, saving you from being stranded on the road.