What are the reasons why a car won't start even though it has power?

[DelKing]

The reasons why a car won't start even though it has power are: 1. Blown fuse, open circuit in the high-voltage coil or open circuit in the low-voltage circuit; 2. Central ignition coil detachment; 3. Distributor rotor leakage; 4. Spark plug damage; 5. Central computer control board failure; 6. Fuel pump malfunction, fuel line blockage, fuel filter clogging, spark plug carbon buildup or injector damage. Solutions for a car that won't start despite having power: 1. Check if fuel level is insufficient and refuel promptly; 2. Inspect the working condition of the car's timing belt; 3. Replace spark plugs; 4. Check if the engine intake pipe is blocked or has water ingress; 5. Inspect the fuel system for any faults.

[OBrynlee]

Last time my car had the same issue - the battery showed power but it just wouldn't start, so frustrating! Turned out to be a problem with the starter motor, possibly worn carbon brushes or a stuck solenoid. If the starter doesn't turn, the engine won't fire up. It could also be fuel delivery issues - a silent fuel pump failure, insufficient fuel pressure in the tank, or clogged fuel injectors preventing proper fuel supply. The ignition system might be at fault too - severely fouled spark plugs not firing, or aged ignition coils failing. Some vehicles have anti-theft systems where incorrect key chip recognition will lock the engine. I'd suggest first listening for the starter's clicking sound, checking the fuel pump operation noise, and doing a quick spark plug inspection. If those don't help, better visit a professional repair shop soon to avoid being stranded roadside - that's even more troublesome!

[LeMia]

This situation usually stems from several key components. In the starting system, if the starter motor or relay is damaged, the battery may have power but current cannot reach the motor. For the fuel system, a failed fuel pump or clogged filter can interrupt gasoline supply. In the ignition system, worn spark plugs or faulty ignition coils may fail to generate sparks, or sensors like the crankshaft position sensor might malfunction and mislead the ECU. Also check for loose battery connections or accidental activation of the anti-theft system. Basic steps: First, listen for starting sounds to assess the motor's condition, sniff the exhaust for gasoline odor to check the fuel system, and try bypassing the starter relay to isolate the issue. If unfamiliar with circuits, consult a technician with a diagnostic tool for quick troubleshooting.

[JulianFitz]

Having driven for decades, I've seen many similar issues. Most of the time, it's the starter solenoid sticking or the fuel pump aging and failing to work, especially in cold weather when the fuel thickens, making it even harder. Wet spark plugs or excessive gap can also prevent ignition. Sometimes, the ECU receives incorrect signals, such as the intake sensor falsely reporting too much air, causing the ECU to cut off fuel supply. In older cars, a broken timing belt can also affect ignition. A quick check: if there's no humming sound when turning the key, it indicates a faulty fuel pump; if the starter doesn't turn, check the relay. DIY repairs are high-risk, so it's recommended to go to a professional shop for handling.