What's the reason for a car suddenly stalling and failing to start?
2 Answers
The main reasons why a car fails to start after stalling are as follows: 1. Due to fuel injector leakage or a damaged carbon canister solenoid valve, causing an overly rich air-fuel mixture, or issues with the intake air temperature sensor. 2. Fuel quality problems or engine carbon buildup leading to an overly lean air-fuel mixture. Extended content: The correct method to start a car is: First observe your ignition keyhole, which generally has four positions! They are "LOCK", "ACC", "ON", and "START". These positions need to be turned progressively - you must never turn directly from "LOCK" to "START" position, as instantaneous power supply can cause significant impact to the car's battery. The battery cannot instantly bear such a large load and may damage the vehicle's electrical system or electronic components. Therefore, you should slowly turn the key, allowing the vehicle's electrical accessories to enter their operational states one by one, thereby easing the battery's power supply pressure.
I've been driving for over ten years, and the situation I fear most is the car stalling and failing to start midway. Common causes include a dead battery, especially with old batteries that have been used for three or four years—they might not handle the sudden high voltage during ignition. Fuel system issues are also critical; sometimes, a faulty fuel pump or a clogged fuel filter prevents fuel from reaching the engine. Starter motor failure is another possibility—if you hear a clicking sound when trying to start the engine but it doesn't turn over, it's likely the motor brushes are worn out. Sensors should also be checked; just last week, I encountered a situation where water got into the crankshaft position sensor, causing the entire car to fail. A reminder to everyone: don't overlook the alternator—if it fails, the battery will be drained quickly. If you really encounter this situation, first check the dashboard warning lights. If you have the tools, test the battery voltage—below 12 volts, there's basically no hope.
