Today's small gang to give you science is a more important problem, like we sometimes the car suddenly broke down, completely do not know where to start. Today we will talk about the cause of this failure and how we can solve it better, some of which we can repair ourselves, and save a lot of money
1 Black smoke from the exhaust pipe
Failure determination: True failure
Cause analysis: It shows that the mixture is too thick and the combustion is incomplete. The main reasons are overload of the automobile engine, insufficient cylinder pressure, low engine temperature, improper adjustment of the carburetor, blockage of the air filter, non-working of individual cylinders and late ignition
Solution: When eliminating, the damper should be checked in time whether the damper is fully opened, and if necessary, maintenance should be carried out; after the flameout is turned off, the main nozzle is seen from the carburetor mouth, if there is oil injection or dripping oil, the oil level of the float chamber is too high, and it should be adjusted to the specified range, tighten or replace the main volume hole; the air filter is blocked and should be cleaned. Unblock or replace.
2 The steering wheel of the vehicle is always incorrect, one will be left, one will be right, and it will be erratic
Cause analysis: This is due to the complete damage to the rubber limit block fixed in the groove of the steering machine.
Resolution: After the new limit block is reloaded, the fault disappears completely.
3 Every time the air conditioner is turned on, the air outlet has a very unpleasant odor, which is even more serious when the weather is wet
Fault determination: Maintenance class failure
Cause analysis: The refrigeration principle of air conditioning is to rapidly evaporate the heat absorption through the refrigerant, so that the temperature of the air flowing through it drops rapidly. Due to the low temperature of the evaporator and the high temperature of the air, the water molecule particles in the air will condense into water droplets on the evaporator, while dust or clothing in the air. Substances such as small fluff on the seat are easy to attach to the surface of the condenser, resulting in mold and bacteria multiplying in large quantities.
Solution: Such air is inhaled by the human body for a long time will affect the health of the driver and the passenger, so the air conditioning system should regularly replace the air conditioning filter and clean the air channel.
4The vehicle is shaking at high speed
Failure determination: True failure.
Cause analysis: When the vehicle is driving normally to about 96km/h, the whole vehicle is shaken, the speed is reduced, the phenomenon disappears, and if it accelerates to about 90km/h, the jitter appears again, indicating that there is a fault in the chassis of the car. The causes of the failure are: tire dynamic balance is inaccurate, front and rear suspension. veer. Transmission and other mechanisms are loosened; front wheel positioning. Wheelbase is inaccurate; half-shaft clearance is too large.
Solution: Eliminate the above faults in time to avoid a vicious circle and cause other faults.
5 Some jitter when loosening the clutch
Cause analysis: Illustrate the clutch fork. Separation of bearings. The pressure plate and friction disc are severely worn, the transfer agent is oil-free, and the front telescopic sleeve of the rear drive shaft and its bearings are severely worn. Ground black, the oil seal on the back cover of the transferor has burned out. There can only be two reasons for the above situation, one is that the positioning between the shafts of the transmission is problematic, resulting in the shafts not being parallel; the other is that the inter-shaft clearance is too large.
Solution: The oil that should be replaced in time to the repair shop to repair the engine has just been replaced and turned black
6 Failure judgment: Failure.
Cause analysis: There are two main reasons for blackening. First of all, due to the role of the cleaning dispersant, and secondly due to the oxidation of the oil in use. If an oil does not become black during use, it means that the oil has not played its normal cleaning role at all. Current oil generally contains a clean dispersant that absorbs the carbon deposits and oxides of the oil generated by combustion so that it can be replaced when the oil is changed, thereby ensuring the cleanliness of the engine interior. Therefore, the blackening of the oil that has just been replaced is not necessarily caused by the internal dirtiness of the engine, as long as the oil can be changed according to the prescribed time.
Solution: Change the oil and oil filter on schedule. After the oil is used for a period of time, the viscosity of the oil becomes thicker and there are acidic products, such as irregular replacement will damage the engine components and affect the normal operation of the engine.
7 Engine oil pressure indicator table shows abnormalities
Cause analysis: When the pointer of the table shows that the oil pressure is abnormal, it indicates that the engine parts are faulty. If the oil gauge pointer shows low pressure or the instrument pointer shows large fluctuations, it may be due to the large wear of the oil pump. The filter is blocked by dirt. The suction filter is placed to expose the oil surface. Low oil level. Caused by the mixed air in the oil circuit and the failure of the pressure gauge. In addition, the viscosity of the lubricating oil is low. Poor oil seal and lubricity. The lubricating oil is too cold and viscous. Too much lubricating oil sludge deposition can also cause the oil pressure indicator to show abnormalities.
Solution: You should go to the repair shop in time to replace the repair statement: This article is reproduced for the purpose of transmitting more information. If there is a source labeling error or infringement of your legitimate rights and interests, please contact the author with the proof of ownership, we will correct and delete it in time, thank you.
