What Causes a Car to Frequently Stall?

[MacHenry]

Reasons for a car frequently stalling include clogged fuel injectors and carbon buildup in the throttle body. Below are the specific causes of frequent stalling: Fuel Injector Leakage or Clogging: If the fuel injectors inside the engine are leaking or clogged, or if there is an electrical fault or insufficient fuel injection, the injectors may not spray fuel as directed by the electronic control unit. This results in an overly lean or rich air-fuel mixture in the engine, causing some cylinders to malfunction and leading to engine stalling. Carbon Buildup in the Throttle Body: The throttle body controls the flow of air into the engine. After air enters the engine, it mixes with gasoline to form a combustible mixture that powers the engine, functioning like a valve regulating air intake. During operation, the engine generates a significant amount of exhaust gases, a small portion of which can enter the throttle body. Over time, if not cleaned, carbon deposits form in the throttle body, increasing the resistance to its opening and closing. This prevents outside air from entering the engine properly, disrupting normal engine operation and often causing stalling.