one. The cause of the failure The internal failure of the TFI4 air flow sensor leads to an error in the intake model, which affects the opening of the EGR valve and the intake throttle valve, resulting in insufficient engine air intake, and abnormal combustion in the cylinder, which not only causes loss of engine…
Case 1 Trouble symptoms: unable to go up at high speed, high fuel consumption, black smoke or basket smoke from the exhaust pipe. The cause of the failure: the intake pipe is leaking or blocked by foreign matter. Nature of failure: mechanical failure. Treatment method: find out the location of the air leakage, eliminate the…
Case 1 Trouble symptoms: The starter and the engine both have normal starting speeds, but they do not catch fire; or sometimes they can catch fire after many long periods of starting. The cause of the failure: There is air in the fuel line. Nature of failure: mechanical failure. Treatment method: fuel line drain Failure…
Case 1 Trouble symptoms: unable to go up at high speed, high fuel consumption, black smoke or basket smoke from the exhaust pipe. The cause of the failure: the air intake pipe is leaking or blocked by a foreign body. Nature of failure: mechanical failure. Treatment method: find out the location of the air leakage,…
Trouble phenomenon: A Zhongtong LCK6125 bus was equipped with a Weichai WP10.360 diesel engine. The throttle failed during driving, the idle speed was increased to 1100r/min, and it entered the Limphome state. Troubleshooting: When the idling speed is 1100r/min, most of the faults are caused by the electronic throttle or the throttle circuit. Connect the…
Case 1 Trouble symptoms: The starter and the engine both have normal starting speeds, but they do not catch fire; or sometimes they can catch fire after many long periods of starting. Cause: There is air in the fuel line. Nature of failure: mechanical failure. Treatment method: exhaust air from the fuel line. Failure analysis:…
1. Fuel supply system structure The bulldozer is equipped with a Chongqing Cummins NT855 diesel engine, which uses a PT fuel supply system with gear pump low-pressure fuel supply and injector high-pressure injection. The gear pump feeds fuel into the fuel injector. When the diesel engine camshaft (shares a camshaft with the diesel engine intake…
1. The urea filter should be replaced every 5W km or once a year. The frequency of replacement of the urea filter should be adjusted appropriately according to the cleanliness of the urea solution. Pay attention to the cleaning and maintenance of the urea irrigation and ventilation pipeline, and clean up the urea crystal and…
One： circuit reason The failure to start the car due to a circuit failure is mainly manifested in the fact that there is no response when turning on the ignition switch or the starting motor speed is too low, and it can feel weak. If these two phenomena occur, it can be roughly judged as…
Fault code: SFC 161 Fault description: XDRP_A (5V) voltage is high The 5V external supply voltage is the power source for many sensors and components in the system. Whether this voltage is stable or not seriously affects the accuracy of the sensor, so it is often monitored by the ECU. The ECU can determine whether…