1. The engine oil pressure indicator gauge displays abnormality
Cause analysis: When the pointer of the gauge shows abnormal oil pressure, it means that the engine component is faulty. If the oil gauge pointer shows low pressure or the gauge pointer shows large fluctuations, it may be because the oil pump is worn out, the filter is blocked by dirt, the oil suction filter is exposed to the oil level, the oil level is low, or air is mixed in the oil line. And the pressure gauge is faulty and other reasons. In addition, the viscosity of the lubricating oil is low, which is equivalent to hiring a mobile vehicle expert. Poor sealing and lubrication of the oil circuit, excessive supercooling viscosity of the lubricating oil, excessive sludge deposition in the lubricating oil, etc. can also cause abnormal display of the oil pressure indicator.
Solution: Go to the repair shop in time for replacement and repair.
2. When I unscrewed the radiator cap, I found that there were always some oil stains floating on the water, and I found that there was moisture when changing the oil.
Cause analysis: The engine has two major circulation systems, one is the coolant circulation system and the other is the lubricating oil circulation system. The two major systems are not connected with each other. If there is oil in the water or water in the oil, there is a problem somewhere in the isolation of the two circulation systems. "Oil has entered water" and "water has entered oil" are two different types of faults. "Water got into the oil" is a problem with the engine body itself, while "water got into the oil" is mostly caused by engine accessories, and the nature of the fault is different.
Solution: Go to the repair shop in time for replacement and repair.
3. The oil pressure indicator light will light up when the car accelerates
Cause analysis: The oil pressure light will light up in two situations: real and virtual. The so-called reality means that the oil pressure is indeed low, low enough for the indicator light to issue a warning, indicating that the lubrication system is indeed faulty and must be eliminated. The so-called virtual fault is that, as suspected, the oil lubrication system did not malfunction, but the oil pressure indicator light system malfunctioned, and the indicator light was illuminated by mistake.
Solution: Although this kind of fault will not affect the normal operation of the engine, it is better to find the root cause and eliminate it in time. Under normal circumstances, the real symptom is more likely and should be used as the main idea to judge the fault.
4. When the car encounters a fault while driving, the steering wheel will swing, and the swing will be more serious when the vehicle is heavy.
Cause analysis: Generally, it is caused by uneven wear of the front tires, the use of newly repaired tires or uneven tire padding, and deformation of the steel rims. Because when the wheel speed is fast, the torque driving the steering wheel to rotate mainly comes from the deflection of the tire or steel rim. When the deflection of the tire or steel ring exceeds 3mm, the deflection torque can drive the steering wheel to swing left and right.
Solution: Go to the repair shop for inspection and replace tires or rims as appropriate.
5. When driving at high speed on a good road surface, the steering wheel will swing when the vehicle is heavy or empty. The steering wheel will swing seriously when the vehicle is heavy. The faster the vehicle speed, the more serious the swing will be.
Cause analysis: Generally, it is caused by the looseness of the connecting bolts between the brake drum and the wheel hub, the looseness of the wheel hub bearing hole, and the uneven thickness of the brake drum due to the boring of the brake drum off the center, resulting in an imbalance.
Solution: Go to the repair shop for repairs in time.
6. Excessive engine oil consumption
Cause analysis: Careful friends will find that there is normal consumption of lubricating oil even when the vehicle is in good condition, but some vehicles are in poor condition. When the car's exhaust emits blue smoke, paying attention to xsjiaoliu is equivalent to hiring a mobile car expert. In fact, this means that the lubricating oil consumption is too large. Generally speaking, the consumption of lubricating oil is nothing more than two situations: entering the combustion chamber to participate in combustion, or oil leakage. The reason why oil can escape into the combustion chamber is mainly because the parts are severely worn, the fitting gap is too large, or the oil pressure is too high, causing the oil to escape into the combustion chamber. The leakage of engine oil is mainly caused by the hardening and aging of the sealing gasket and the stuck valve. If it is an old vehicle, there is usually a situation where the gasket is not tightly sealed due to aging.
Solution: It is best for you to go through a professional maintenance center, where a maintenance engineer will make a determination and implement effective solutions.
7. There is a slight "rattling" sound when the door glass is raised and lowered
Cause analysis: After the car has been used for a period of time, there will be a slight "rattling" sound when the door glass is raised and lowered. "Crack" sound. Especially the driver's side. This is mainly because the wind and sand in the north are relatively large, which often leaves some fine dust and gravel in the contact area between the door glass and the sealing strip, causing noise when the glass is raised and lowered. At this time, the sealing strip of the door glass and the sand and dust in the slide groove should be cleaned in time, otherwise the door glass will be scratched.
8. When the turn signal is on, the frequency of flashing is faster than usual
Cause analysis: When the handle of the turn signal is moved, the turn indicator light on the instrument panel flashes. The frequency is faster than usual, this is a malfunction. It is usually caused by a change in the resistance of the circuit after the steering bulb on one side is broken.
Solution: Go to the repair shop in time for replacement and repair.
9. The windshield cannot be wiped clean when it rains lightly
Cause analysis: It feels good to use the wipers when it is not raining heavily, but when it rains lightly, the wipers are started. , you will find that the wiper will leave uneven wiping marks on the glass surface; this situation indicates that the wiper blade has hardened, or the wiper blade has scars, which will cause uneven wiping and form residue dirt.
Solution: Replace the wiper or wiper film surface. However, when replacing, please note that the installation method and length of the wiper are different depending on the model and year. Some wipers only need to replace the rubber blade, while some wipers need to be replaced as a whole.
10. When the heater is turned on in winter, the front windshield is foggy and smells sweet
Cause analysis: This phenomenon occurs when your vehicle uses heater. Generally, It was caused by a slight leak in the heating water tank in the cab. The fog on the front windshield is caused by the wind generated by the blower in the car driving the leaked antifreeze out of the air duct and condensing on the front windshield. At the same time, people can also feel the special smell of the antifreeze. At this time, the fan should be turned off and the fog will gradually dissipate.
Solution: Go to the repair shop in time for replacement and repair.
11. The vehicle's steering "wanders" when driving
Cause analysis: It is often caused by the front wheel "swaying" during driving. The reasons include: padding tires or vehicle repairs. The balance of the front wheel assembly is destroyed; parts of the transmission shaft assembly are loose; the dynamic balance of the transmission shaft assembly is destroyed; the shock absorber fails; the stiffness of the leaf spring is inconsistent; the steering system parts are worn and loose; and the front wheel is improperly calibrated.
Solution: Go to the repair shop in time for replacement and repair.
12. The engine temperature is suddenly too high while driving
Cause analysis: If the car is running, the coolant temperature gauge indicates that it reaches 100℃ very quickly, or the car is cold. When starting, the engine coolant temperature quickly rises to boiling. After replenishing the coolant, it returns to normal, but the engine power drops significantly. Paying attention to xsjiaoliu is equivalent to hiring a mobile vehicle expert. It indicates that there is a failure in the engine mechanical system. Most of the causes of this type of failure are: serious water leakage in the cooling system; the cylinder gasket that isolates the water jacket from the cylinder is washed out; the main valve of the thermostat falls off; the fan drive belt is loose or broken; the water pump shaft and impeller are loose; the fan clutch is working bad.
Solution: Check the cause of the failure and repair and replace accordingly.
13. The steering wheel of the vehicle is difficult to control when driving
Cause analysis: It may be that the specifications or air pressure of the front wheels on both sides are inconsistent; the caster angle of the front wheels on both sides or the wheel The camber angles are not equal; the front wheel hub bearing clearances on both sides are inconsistent; the camber or elasticity of the leaf springs on both sides are inconsistent; the wheelbase difference between the left and right sides is too large; the wheel brake clearance is too small or the brake drum is out of round, causing the brake on one side to The brakes are stuck, causing the brakes to lag; the vehicle is loaded unevenly, etc.
Solution: Go to the repair shop in time for replacement and repair.
14. Fog inside the headlight
Cause analysis: There is a plastic or rubber ventilation channel on the back cover of the headlight. This channel is in the structure of the headlight. It must exist, otherwise the thermally expanded gas cannot be eliminated. This breathable channel can only let gas out but not water.
Solution: If there is slight fogging, it will dissipate quickly after air circulation or turning on the headlights. If there is always water or the fog cannot be dissipated, you need to go to a professional car repair shop to eliminate it. .
15. The whole vehicle shakes when the vehicle is driving at high speed
Cause analysis: When the vehicle travels normally to about 96km/h, the whole vehicle shakes, and the vehicle speed is reduced. It disappears. If the jitter reappears when accelerating to about 90km/h, it means there is a fault in the car chassis. The causes of the failure include: misalignment of tire dynamic balance; looseness of front and rear suspension, steering, transmission and other mechanisms; misalignment of front wheel positioning and wheelbase; and excessive half-axle clearance.
Solution: Eliminate the above faults in time to avoid a vicious cycle and cause other faults.
16. When the car turns, the steering wheel turns a big turn but turns into a small turn. The steering wheel turns a small turn but turns into a big turn.
Cause analysis: The two phenomena that occur when steering are called understeer and oversteer, indicating that there is a problem with the steering system. There’s also the phenomenon of steering, which is the equivalent of hiring a dolly expert. It started out as understeer, then turned into oversteer halfway through, turning sharply to the inside. This is the most dangerous reverse steering phenomenon and is prone to accidents.
Solution: This situation only occurs on a few rear-engine cars. Everyone remember to go for repairs in time.
17. It is difficult to start the engine when it is cold. The engine vibrates after starting and then becomes stable. The engine starts to vibrate at medium and low speeds, but improves at high speeds.
Cause analysis: It may be a spark plug failure or premature ignition time. If the spark plug is not faulty, it can be judged that the ignition time is too early.
Solution: When the above fault occurs, you should go to the repair shop for repair in time.
18. Black smoke is emitting from the exhaust pipe
Cause analysis: It indicates that the mixture is too rich and the combustion is incomplete. The main reasons are car engine overload, insufficient cylinder pressure, engine temperature is too low, improper carburetor adjustment, air filter blockage, individual cylinders not working and ignition too late, etc.
Solution: When troubleshooting, check in time whether the choke is fully open, and perform maintenance if necessary; after turning off the flame, look at the main nozzle from the carburetor mouth. If there is oil pouring out or dripping, the float chamber oil If the surface is too high, it should be adjusted to the specified range, and the main measuring hole should be tightened or replaced; if the air filter is clogged, it should be cleaned, unclogged, or replaced.