What is the problem if the car stalls immediately after starting?
2 Answers
Car stalling immediately after starting is usually caused by excessive carbon deposits, clogged fuel injectors, or abnormal ignition system. Below are detailed explanations of the causes: Excessive carbon deposits: Carbon deposits typically accumulate in areas such as the throttle valve, spark plugs, cylinders, fuel lines, and intake ducts. They are a coking-like substance formed when fuel is exposed to high temperatures. Clogged fuel injectors: This issue is also quite common. Using low-quality fuel not only increases carbon deposits but may also clog the fuel injectors, resulting in poor atomization. Additionally, low-quality fuel directly affects combustion efficiency, increasing fuel consumption. Incomplete combustion produces carbon monoxide, which can accumulate inside the vehicle and potentially lead to fatal poisoning. Abnormal ignition system: Common faults include carbon buildup on spark plugs and insufficient ignition voltage.
I've repaired many cases of cars stalling right after starting, usually due to several major issues. The most common is fuel system failure, such as an aging fuel pump with insufficient pressure, causing the engine to stall due to lack of continuous fuel supply after ignition. The ignition system also frequently has problems, like carbon buildup on spark plugs or aging wires, leading to poor ignition. In terms of sensors, if the crankshaft position sensor fails, the computer can't accurately determine the engine's speed and position, often resulting in control errors and stalling. Cold weather starts are more prone to this issue, as fuel lines may freeze and block, or the fuel may not be suitable for low temperatures. During inspection, first listen for the fuel pump's humming sound when starting—it should be there if functioning normally. Then check if the relevant fuses in the fuse box are blown; these are simple to replace. If you can't handle it yourself, quickly tow the car to a professional repair shop for diagnosis to avoid worsening the problem. For routine maintenance, remember to regularly change the oil filter and spark plugs, which can prevent many troubles.
