The influencing factors of truck power

Car owners who go to the repair shop for repairs often say this, "I feel that the engine is always underpowered. What is the reason?" There are so many reasons for the engine underpowering, and it is difficult to determine which one it is? Today we have sorted out 30 different reasons for you, so you don’t have to worry about finding them incorrectly!

1.The throttle cable is installed and adjusted improperly. This situation can be eliminated by simply adjusting the throttle cable.

2.While the accelerator pedal is pressed to the bottom, the accelerator handle on the fuel injection pump is also held up by the limit bolt, but the engine speed still cannot reach the rated speed. Adjust the limit bolt appropriately to solve the problem.

3.The fuel tank filter is clogged, the fuel coarse filter is clogged, the fuel fine filter is clogged, and the oil circuit is blocked.

4.The oil transfer pump is leaking and the oil supply is not smooth.

5.The oil quality is poor and contains a lot of water and impurities.

6.The intake pipe is clogged, bent, and the air filter is dirty, resulting in high air intake resistance and poor engine performance.

7.The supercharger is damaged, the supercharger's supercharging effect is poor, the supercharger bypass valve fails, the supercharger cannot reach the rated speed, resulting in poor supercharging effect and engine weakness.

8.If the fuel injection timing of the fuel injection pump is inaccurate, it will cause poor engine power.

9.The plunger pair of the fuel injection pump is worn and stuck; the oil outlet valve of the fuel injection pump is damaged; the governor of the fuel injection pump is stuck and worn.

10.The smoke limiter diaphragm is damaged.

11.The fuel injector has poor atomization and even parts are stuck.

12.The exhaust brake butterfly valve does not return well, blocking the exhaust passage, and the exhaust resistance is large, causing the engine to be weak.

13.The exhaust pipe and muffler are clogged, and the exhaust resistance is large, causing the engine to become weak.

14.Fuel injector failure. Due to water and impurities in diesel fuel, the fuel injector needle valve is stuck and cannot operate. The fuel injector does not inject fuel or does not atomize, but the EcU may not report an error. If the injector wiring harness is worn out due to vibration or is grounded on the cylinder head, the EcU will report an error.

15.If the temperature is too high, the EcU will enter the thermal protection function and limit the engine power.

16.Synchronization signal error.

17.When there is a problem with flow measurement, the high-pressure oil pump will supply oil to the common rail pipe at its maximum capacity. At this time, the pressure relief valve of the common rail pipe will open, and a "click" sound will occur.

18.The accelerator pedal position sensor is faulty, and the connector or wiring harness is faulty. This will cause the engine speed to be limited and cause the engine to become weak.

19.High fuel return temperature causes engine weakness. The fuel return pipe is bent, the inner diameter is too small, and the oil return resistance is large, resulting in high return oil temperature.

20.The cylinder gasket is damaged, the cylinder sealing is reduced, or there is communication between the two cylinders causing weakness.

21.The cylinder liner, piston ring, and piston ring groove wear exceed the limit, and the cylinder sealing performance decreases, resulting in a decrease in engine power.

22.The valve seal is poor and the cylinder pressure drops, resulting in a decrease in engine power.

23.The valve foot clearance is too large, resulting in insufficient air intake and incomplete exhaust, resulting in engine weakness.

24.The valve timing phase is out of tune, the early opening and late closing angles of the intake and exhaust valves are out of sync with the piston connecting rod mechanism, resulting in a decrease in engine power.

25.The engine water temperature is high, causing the engine working condition to deteriorate and causing the engine to become weak.

26.The clutch slips, the engine power cannot be effectively input into the transmission system, and the vehicle runs weakly.

27..The driving system is improperly adjusted, such as the front and rear wheel hub bearing clearances being too large or too small, resulting in high driving resistance and weak driving of the vehicle.

28..The brake system is biting, the brake shoes are not returning well, and the vehicle is running weakly.

29..The transmission system is not properly matched and the vehicle is unable to drive, especially when going uphill with a heavy load.

30.The vehicle was severely overloaded, resulting in inability to drive.

If you find a problem with insufficient power, first check these 30 reasons, which may be helpful to you!