What Are the Reasons for High Fuel Consumption in Trucks?

[LaMalia]

The reasons for high fuel consumption in trucks are as follows: 1. Insufficient air supply from the turbocharger system: Turbocharger internal leakage, loose intercooler pipe clamps, exhaust manifold gasket and intercooler leaks. The engine runs normally at idle but emits black smoke during rapid acceleration. At high RPMs, the typical turbocharger whistling sound is absent. Pressure gauge measurements show below 2 bars, requiring turbocharger replacement. 2. Abnormal fuel supply system: Worn plungers inside the fuel pump cause insufficient working pressure. Internal wear of injectors or partial clogging of injection holes leads to poor atomization. Black smoke and eye irritation occur during both idle and rapid acceleration. Engine temperature runs high during operation. 3. Abnormal valve train system: Due to thermal expansion, engine components expand as temperature rises during operation. If clearances are too small, thermal expansion of valves and their components (valve lifters, camshaft, etc.) in hot conditions causes improper valve sealing, resulting in engine leakage and power loss.