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What Causes Engine Stalling After Ignition?

1 Answers

ReaganLee

07/30/25 1:08am

The causes of engine stalling after ignition include carbon buildup or fuel system malfunctions. Below are detailed reasons and solutions: Reasons for stalling after ignition: 1. Carbon buildup: During cold starts, the engine temperature is low, and fuel is less volatile and harder to vaporize. If there is severe carbon buildup in the fuel lines or intake passages, these deposits will absorb fuel vapors, leading to an overly lean air-fuel mixture in the combustion chamber. This can cause unstable idling or immediate stalling after ignition. After several ignition attempts, the carbon deposits become saturated with fuel vapors, allowing the air-fuel mixture to normalize and the engine to start. 2. Fuel system issues: (1) A faulty fuel pump may suddenly seize or malfunction, causing insufficient fuel supply and stalling. (2) Low fuel system pressure due to a weak fuel pump, fuel leaks, low electrical current, or a damaged fuel pressure regulator can result in inadequate fuel delivery. (3) Clogged or leaking fuel injectors can cause poor fuel atomization, leading to insufficient fuel supply and stalling. Solutions for stalling after ignition: 1. Firmly grip the steering wheel with your left hand to maintain control. 2. Press the brake pedal hard with your right foot to reduce speed as much as possible, then quickly shift the AT transmission to N (Neutral). 3. Turn the key back one position, restart the engine, and shift back to D (Drive) to resume normal operation.

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