What Causes the Car to Keep Running After Removing the Key?
2 Answers
Power supply relay J329's control wire is short-circuited to ground, resulting in a continuous power supply state even after turning off the ignition switch. Below is relevant information about car stalling: 1. Car stalling: Also known as flameout. When the reactor is operating at a significant reaction rate, if the inlet feed temperature is reduced to the lower limit of the multiple steady-state region, the reaction rate suddenly drops sharply, and the reaction essentially stops. This phenomenon is called flameout. The corresponding inlet temperature is called the flameout point. Generally, it refers to car stalling. 2. Causes of stalling: (1) Automatic transmission models: Automatic transmission models do not stall easily, whereas manual transmission models may stall frequently due to insufficient driving skills. However, it cannot be ruled out that automatic transmission cars may also stall, mainly due to the use of inferior fuel causing engine carbon buildup and stalling. (2) Additionally, for new cars (automatic transmission), the main cause of stalling is insufficient driving proficiency. Another possibility is issues with the car's engine or fuel system, but for new cars, the likelihood of engine problems is relatively small, with most cases being fuel system-related. (3) Finally, for older models, apart from insufficient driving skills, the cause of stalling is often the use of substandard fuel leading to engine carbon buildup and other related issues.
I think it's quite common for cars to keep running after removing the key, especially for experienced drivers like me who've been driving for over 10 years. The usual cause is stuck contacts in the ignition switch, where aging leads to internal adhesion, making the system think the key is still inserted. Another possibility is an issue with the Engine Control Module (ECU), like software glitches or hardware failures, keeping the engine running. A malfunctioning anti-theft system might also be at play, failing to recognize that the key has been removed. In my case, it was a switch problem—I had to insert and remove the key a few times before the engine shut off. Safety first: once you notice this, park the car safely and check the fuses and wiring before attempting to restart, to avoid engine damage. If it happens repeatedly, visit a professional repair shop as soon as possible—replacing a part usually fixes it.
