What are the reasons for a truck's lack of power when accelerating and inability to pick up speed?

[LeZachary]

The reasons for a truck's lack of power when accelerating and inability to pick up speed are: 1. Engine misfire, leading to increased fuel consumption, black smoke emission, poor acceleration, and severe shaking; 2. Clutch slippage, resulting in incomplete gear engagement or disengagement; 3. Low fuel rail pressure; 4. Dirty throttle position sensor or voltage imbalance causing electronic throttle failure. Classification of trucks: Trucks are divided into light-duty, medium-duty, and heavy-duty types, with varying classification methods and standards across countries. In China, trucks are classified based on load capacity: those with a load capacity below 3.5 tons are light-duty trucks; those between 4 to 8 tons are medium-duty trucks; and those above 8 tons are heavy-duty trucks.