What Causes a Car to Briefly Stall When Accelerating?
2 Answers
Car stalling typically refers to the engine losing control, including scenarios like engine shutdown, unresponsive throttle, or runaway acceleration. Common causes of stalling are diverse but primarily stem from faults in fuel, electrical, cooling, or mechanical systems—such as a stuck throttle cable, jammed throttle motor, poor throttle sensor contact, open circuits, excessive engine temperature, or insufficient fuel, engine oil, or coolant. Below are detailed explanations of car stalling: 1. Definition: Car stalling occurs when the engine is running but the torque converter's output speed drops to zero, meaning the impeller rotates while the turbine remains stationary. 2. Purpose: By testing the maximum RPM the engine can achieve in a stalled state, this method evaluates overall engine performance and the operational quality of automatic transmission components.
My car has experienced this situation - occasional brief stalling or hesitation when stepping on the accelerator. It might originate from intake system issues, such as excessive carbon buildup on the throttle body restricting airflow, especially noticeable during cold starts. Alternatively, insufficient fuel supply could be the cause - a clogged fuel filter may restrict fuel flow, failing to meet sudden demand during acceleration. Faulty electronic sensors like the mass airflow sensor might also send incorrect signals to the engine control unit. Regular throttle body cleaning, fuel filter replacement, and checking engine light warnings are recommended. For safety, when stalling occurs, keep the steering wheel steady, apply brakes gently, and seek professional diagnosis promptly.
