Nine Common Sudden Failures of Vehicles
1. Sudden changes in working conditions
The so-called sudden change in working conditions refers to the sudden abnormal phenomenon of the working conditions of the vehicle. This is a common failure phenomenon, usually sudden. When it happens, you should deal with it calmly. Common problems are: it is difficult or even impossible to start the engine after it suddenly turns off; the engine power suddenly drops during driving, causing the driving to lose power; the brakes suddenly fail or deviate during driving. Although the symptoms of this fault are obvious and easy to detect, its causes are complex, often changing from gradual to sudden changes. Therefore, in this case, you should calmly pull over. If you have no maintenance experience, it is recommended that you go to the maintenance office for maintenance.
2. Abnormal sound
Some faults can cause abnormal noise in the car engine or chassis, which should be taken seriously, otherwise it is easy to cause mechanical accidents. Experience shows that if the sound is heavy and accompanied by obvious seismic steepness, it is mostly a malignant fault. Stop the machine immediately and find out the cause. Due to different reasons, general sounds often have different characteristics. When judging, check carefully, listen carefully, and distinguish correctly.
3. Overheating phenomenon
Overheating usually occurs in assemblies such as engines, transmissions, drive axles, and brakes. Under normal circumstances, no matter how long the car works, these total temperatures should be maintained at a certain temperature. In addition to the engine, if you feel hot and unbearable when you touch it with your hand, it means that the part is overheated. Engine overheating indicates that there is a problem with the cooling system. If it is not eliminated in time, it will cause knocking, pre-ignition, driving fatigue, and even combustion accidents.
4. Leakage phenomenon
Leaked fuel, lubricating oil, cooling water, brake fluid, steering system fluid, etc. should not be taken lightly. Once discovered, it should be eliminated immediately, otherwise it will cause overheating and combustion losses.
5. Abnormal exhaust color
For gasoline engines, normal exhaust should have no obvious smoke. When the oil flows on the cylinder, the exhaust gas is blue; when the combustion is incomplete, it is black; when the oil and water are mixed, it is white. Abnormal diesel engine exhaust is often accompanied by engine weakness or difficulty in starting.
6. Loss of control or trembling
This is mainly caused by incorrect front wheel alignment and unbalanced crankshaft or drive shaft.
7. Abnormal fuel consumption
Generally caused by poor engine operation or improper chassis adjustment. The engine oil consumption is too large. In addition to leakage, most of this engine has faults. At this time, the refueling port is often accompanied by a lot of smoke or pulsating smoke, and the exhaust color is abnormal. The main reason is that the matching clearance between the piston and the cylinder wall is too large or severely worn.
8. It has a special smell
When the brakes are dragged and the clutch slips, there is usually a burnt smell. When the engine is overheated or the oil is burning, a special smell will be emitted; when the circuit is short-circuited, the ground wire is burned and there is a peculiar smell. Once a problem is found during driving, stop and find out the problem.
9. Abnormal appearance of the car
Most of the reasons are caused by abnormalities in the frame, suspension, tires and other parts. In short, these symptoms are easy to find, and those that can be eliminated should be solved as soon as possible. If not, contact the repair shop for a comprehensive inspection.
The above are the troubleshooting measures for commercial vehicles after modification. If you have other needs, please call for consultation.
