Why does the truck, which was previously powerful, lack strength when climbing slopes?

[ReidLynn]

Truck climbing slopes lack strength for the following reasons: 1. Poor fuel supply condition: The filter element is slightly clogged, the one-way valve does not close tightly, and the fuel supply is insufficient, causing the engine to perform inconsistently. 2. Clogged air filter element: The valve does not close tightly, leading to cylinder wear and unstable cylinder pressure, resulting in insufficient engine power. 3. Excessive carbon deposits: The fuel injection pump and injectors are aged, severely carbon-deposited, and in poor condition, causing inconsistent fuel injection quantities. Generally, trucks can be divided into semi-trailers, full trailers, and mixer trucks. Most trucks on the market are used as transport vehicles for delivering goods to generate economic benefits, serving as the main force for long-distance goods transportation.