What is the reason for the engine stalling when idling normally but accelerating suddenly?
2 Answers
Here are the reasons why the engine stalls when idling normally but accelerating suddenly: Reason: Based on the phenomenon, the first consideration should be the lean mixture. When the accelerator is pressed, the throttle opening increases, the engine's air intake increases, but the fuel injection does not keep up, leading to a lean mixture. As the gasoline engine's mixture becomes increasingly lean, combustion becomes faster and more unstable, eventually causing the engine to stall. Idle Introduction: Idle is a working condition of a car, referring to the engine running in neutral. The engine speed during idle is called the idle speed. The idle speed can be adjusted by changing the throttle size and other methods. Idle means the engine is "producing power without doing work."
I've been driving this car for over ten years and have encountered the issue of stable idle but stalling upon acceleration quite often. Usually, it's due to severe carbon buildup in the throttle body. At idle, it can still manage, but when you step on the gas, insufficient air intake causes an imbalance in the air-fuel mixture, leading to stalling. It could also be caused by aging spark plugs failing to ignite during acceleration. Another common issue is insufficient fuel pump pressure, unable to supply enough fuel during sudden acceleration. Last time my car had this problem, cleaning the throttle body solved it, and I also replaced the spark plugs. I recommend checking these simple components first—it's straightforward and cost-effective. If the problem persists, then you'll need to inspect the sensors or electrical circuits. Regular maintenance is key; don't wait until the last minute for issues to arise.
