What are the reasons for a car stalling shortly after starting?
2 Answers
The reasons for a car stalling shortly after starting are: 1. Carbon deposits: These usually accumulate in the throttle valve, spark plugs, cylinders, fuel lines, intake ducts, etc., and are a charred substance produced by fuel under high temperatures. 2. Ignition system issues: Common faults include spark plug carbon deposits and insufficient ignition voltage. The former can be addressed by physical and chemical carbon cleaning, while the latter can be resolved by replacing the spark plugs to solve the insufficient voltage problem. 3. Poor fuel quality and clogged fuel injectors: This is also a relatively common issue. Using low-quality fuel not only produces more carbon deposits but may also clog the fuel injectors, resulting in poor atomization. Additionally, low-quality fuel directly affects combustion efficiency, increasing fuel consumption. The carbon monoxide produced by incomplete combustion can accumulate inside the car and may even cause poisoning.
I recently encountered this issue as well and have given it a lot of thought. When a car starts but then quickly stalls, there are usually several common reasons. Fuel system problems are the most frequent, such as a faulty or aging fuel pump causing insufficient fuel supply, leading to stalling; a clogged fuel line, like a blocked filter, can have the same effect. The ignition system is also a culprit—severely worn spark plugs or faulty ignition coils can interrupt the spark, making ignition impossible. Sensor failures should not be underestimated either. For example, a malfunctioning crankshaft position sensor can cause the engine control unit (ECU) to shut down the engine automatically if it doesn't receive a signal. Air intake system leaks or blockages, disrupting the air-fuel ratio, can also make ignition difficult. I later found out it was a fuel pump issue after repairs. Regular inspections and part replacements can reduce these troubles, so it's advisable not to wait until the car breaks down on the road to address them.
