What are the reasons for a car not starting or making noise when there is power?
2 Answers
The reasons for a car not starting or making noise when there is power are as follows: 1. Engine failure: Related to issues such as poor performance of the main fuel injector, cold start fuel injector, temperature control switch, ECU and control circuit, weak battery, damaged ignition or pulse generator, fuel system not supplying fuel or supplying fuel abnormally, etc. 2. Automatic transmission failure: Symptoms include slow acceleration, strong impact during automatic gear shifting, high oil temperature, lack of high-speed gear, inability to start, or inability to shift the gear lever. Most automatic transmission failures are caused by untimely maintenance and adjustments, apart from long-term wear and tear. 3. Steering wheel wobbling or misalignment: When driving, the car may exhibit unstable direction, swaying back and forth, or steering wheel shaking. This is caused by excessive steering wheel deflection, unbalanced steering wheel dynamics, loose steering mechanism components, incorrect front wheel alignment, or air in the power steering hydraulic system. 4. Brake failure: When braking while driving, the car fails to slow down or stop; after one or multiple continuous braking attempts, the brakes suddenly stop working. Possible causes include brake fluid or air leakage in the brake lines, broken or disconnected pipe joints, or failed brake sealing components. Below is additional information: 1. The car's ignition system is designed for spark-ignition engines to operate normally by providing high-voltage electricity to the spark plugs in the correct firing order, ensuring a strong enough spark to ignite the combustible mixture. 2. Ignition systems are divided into traditional ignition systems and electronic ignition systems.
Last time I encountered this situation, I was really anxious. The car had power but didn't make a sound when turning the key. I figured it might be a seized starter motor, which is like an old electric fan at home - when the bearings rust after long use, it can't rotate. Another possibility is that the small starter relay is faulty. It controls the current flow, and if the contacts are burnt out, electricity won't pass through. Incorrect transmission gear position can also cause this, especially in automatic cars - make sure it's in P or N gear, otherwise the anti-theft system will lock it directly. Corroded or loose wiring connections are also common, especially in older cars - tighten that thick starter cable connection. Finally, don't forget to check the ignition switch - if there's poor contact there, the entire circuit won't respond. When facing this situation, don't force it; going to a repair shop is the most worry-free solution.
