What are the reasons for the sluggish and weak acceleration of the Golf 6 engine?

[DeMaddox]

Reasons for weak engine acceleration: failure in the engine lubrication and fuel system, engine overheating; intake pipe leakage leading to overly lean air-fuel mixture; weak high-voltage spark due to faulty spark plugs, ignition coils, or high-voltage wires; malfunctioning exhaust gas recirculation system; faults in the air flow meter, intake manifold absolute pressure sensor, throttle position sensor, etc.; turbocharging system failure; carbon buildup in cylinders, throttle, spark plugs, intake pipes, etc. Below is additional information: Symptoms of sluggish and weak car acceleration: This symptom can also be called engine power deficiency, often manifested when the car is driving at high speed or going uphill, especially under heavy load. The engine power is noticeably insufficient and weak, and when the accelerator is pressed, the speed does not increase rapidly; the exhaust feels dull, the car lacks power, and fuel consumption rises sharply, etc.