Theoretical fuel consumption: the normal maintenance of the 6.9-liter/100-kilometer Yuefeng air conditioner is still very fast, but this air conditioner uses 1. 4L car, a little too much. After turning on the air conditioner, the power consumption dropped obviously. If no other adjustments are made, the second and third gears will obviously become soft after turning on the air conditioner, and the noise of stepping on the accelerator will become louder, but the speed increase is quite weak. If you encounter this problem, you don't need to be too nervous. You need to communicate with the maintenance personnel of the automobile maintenance service station to make adjustments and maintenance. Special attention: special attention should be paid to the renovation of the drive belt. Do not renovate the drive belt, which will cause the material of the drive belt to break and the drive belt to be damaged. Check all belts for cracks, cracks, wear and proper tension, and adjust or replace the belts if necessary. Precautions for steering wheel in forward position and steering column locking Before disconnecting the steering column or intermediate shaft from the steering machine, the wheels must be kept in the forward position and the steering column must be in the "locked" position, otherwise, the coil assembly in the steering column will be dislocated and damaged. Pay special attention to engine emission. Modification of the engine or its components will affect the emission control of the vehicle, and it is possible to turn on the fault indicator. Modification will also make the vehicle fail the required emission inspection/maintenance test. In order to avoid personal injury and vehicle damage, please use the carpet with the same thickness and material size as the original carpet during maintenance or replacement, and restore the carpet to its original position. Operation of Hood Latch When the hood is opened, observe the operation of the auxiliary latch. When the main lock pin and the auxiliary lock pin are released, the auxiliary lock pin shall prevent the hood from fully opening. The hood must be tightly closed. Replace the spark plug lead, clean the lead, and check the lead for burns, cracks or other damage. Check whether the wire sheath is installed on the direct ignition system module and the spark plug. If necessary, replace the wire. Expert advice: 1, check disc brake pads and drum brake pads every 5,000 kilometers or every 3 months, and carefully check the thickness of brake pads and friction plates. If it is estimated that the brake or friction lining cannot reach the next scheduled maintenance time, replace them, check the brake fluid storage and cover the vent hole. Make sure there is no dust and the passage is clear. 2. Replace the air filter every 65,438+00,000 kilometers. In dusty conditions, it is necessary to shorten the replacement interval of air filters. User manual: storage of spare tire and jack. Pay attention to the clicking sound at the rear of the vehicle. The spare tire, all equipment and tools must always be fixed, and the jack or screw mechanism should be lubricated with engine oil after each use. The smoothness of the cleaning oil system is the key to the stability and fuel economy of the automobile during driving. After driving for a long time, due to the different influences of climate, environmental changes, fuel or driving habits, carbon deposition will occur in the intake system of the engine fuel nozzle and intake valve, in which the fuel nozzle is close to the intake valve and the temperature is very high, which is most likely to cause local high-temperature oxidation of fuel, resulting in carbon deposition in the fuel nozzle. Carbon deposition will reduce driving performance, increase exhaust pollution, fuel consumption, and poor idle jitter during cold start. It is recommended that the owner clean the throttle once after driving for 20,000 kilometers. In fact, this basic cleaning action is not difficult. It is suggested to use "full power engine oil cleaner" to clean the whole tank, oil pipe, fuel nozzle, carburetor, intake port, combustion chamber and cylinder head at one time. In addition, due to the multi-valve design of modern high-performance engines, the air intake is more sufficient and the exhaust is more thorough, and each cylinder has 3 to 6 valves. In some engines, the valve opening and closing time can change with the engine speed and load, but gum will affect the valve opening and closing time and opening and closing accuracy. If the intake valve is not smooth, it will not be able to provide a proper amount of mixed steam, resulting in weak acceleration, low-speed breathing and even flameout of the engine. In order to improve this situation, car owners can use "fuel additives" to clean up the deposits around the intake valve and restore engine horsepower. As long as the tank is filled with oil, the detergent can be poured directly into the tank. It is recommended to maintain it regularly every 5000 kilometers. F3 price: 558-95800 yuan, displacement: 1468- 1800 cc, overall dimension (length/width/height): 4533/ 1705/ 1490mm, theoretical fuel consumption: 4. BYD F3' s engine and gearbox units are very mature. Mitsubishi 1.6 liter 4G 18 used in early models and Mitsubishi 1.5 liter 4G 15S used later were produced and provided by Harbin Dongan Mitsubishi Engine Factory. Among the domestic models, the penetration rate of 4G 18 is still very high, and Southeast Lingshuai, Lan Se, Chinese Jie Jun and Haifuxing are all equipped. 4G 18 engine has been produced in China for more than 0 years. Its main advantages are compact structure, high power and fuel economy. The fuel-saving trick of 4G 18 is MVV (vertical vortex lean combustion). Under the action of the intake baffle and the longitudinal vortex control piston, the mixed gas forms a vertical vortex in the cylinder, so that the concentration of the mixed gas in the cylinder gradually decreases from inside to outside, and then the ECU adjusts the ignition time to make the flame spread fastest in the cylinder. In this way, the thermal efficiency of the engine can be improved and the fuel consumption can be reduced. In addition, the compression ratio of 4G 18 engine is 9.5, which is in a relatively low range, so it can better adapt to the domestic oil consumption situation. This brings great adaptability to the 4G 18 engine. What should I do if there is oil on the engine valve cover? Early car owners, especially those who bought BYD F3 in 2006, often found some oil stains on the valve cover of 4G 18 engine. Many people are worried about this. Because there is oil pollution in the parts involving the engine, it means that the engine is beginning to leak oil. The engine is the heart of a car. If there is something wrong with the heart, can it not make people worry? In fact, the oil stains on the engine valve cover are easy to find, and there is no need to distinguish between experienced and novice. After parking, we open the engine compartment cover, and generally the first thing we see is the engine valve cover (the oil filler is on the plane of the engine valve cover). Under normal circumstances, there is thick dust on the valve cover, which is normal. After maintenance, it is also common that some engine oil overflows at the oil filler to form oil stains. But if there is oil pollution in other places, it should be caused by oil leakage. Master Zhou suggested that early BYD F3 users should not worry about finding such problems. This small problem is caused by insufficient torque of the six screws fixing the valve cover. The reason for this problem is very simple: 4G 18 engine adopts cast iron cylinder block and aluminum alloy cylinder head, but the valve cover is fixed on the aluminum alloy cylinder head, and the strength of aluminum alloy is softer than that of cast iron, which determines that the torque should be appropriately reduced during assembly. Because the torque of these six screws can not meet the standard requirements, or some can meet the requirements, some can not meet the requirements, in the future driving will be more or less reduced. The solution is actually very simple, that is, according to the operation manual, tighten the six fixing bolts diagonally with a kilogram wrench, and this small problem will be solved. For some really unqualified screw products, we usually take the treatment of replacing and fastening the screws. Generally, after the above treatment, almost no users report that there is oil pollution on the valve cover. Advanced mold production line BYD's mold production line comes from Dihara, Japan. At present, the mold production base is located in Tongzhou, Beijing, and the quality monitoring personnel of the whole production line are all from Japan. World-class well-known enterprises contacted BYD Mould and reached the cooperation intention. Therefore, in terms of mold technology and manufacturing accuracy, BYD's position in the field of existing independent brands has not been shaken. What should I do if there is something wrong with the power window? Many car owners reported that BYD F3 glass lifter made abnormal noise when the glass was lifted and lowered, the speed of both ends of the glass was different before and after lifting, and even the glass derailed with the lifter arm. This problem is not just a common problem of BYD F3. It is also common in many similar models and even joint venture brands. Many car owners therefore suspect that some early or a batch of BYD F3 electric window lifting accessories have quality problems. After we found this problem through the feedback from the owner, we used the method of spraying wax to lubricate the glass mud tank. If this phenomenon still exists after wax spraying, the general claim adjuster will declare the claim and replace the parts according to the advice of the maintenance master. In the early days, this was a very effective method, but many car owners still had the same problem after replacing the brand-new elevator assembly, which puzzled many 4S maintenance masters for some time. What's the problem? After grouping and communication with other 4S maintenance personnel, it is generally reflected that there is no quality problem in the electric glass lifter itself, but the outer rubber strip connecting the outside of the car door and sealing the window glass is too tightly attached to the window glass, resulting in extra force on the glass when it runs through the lifter. In the long run, the lifter is bound to appear deformation, abnormal sound, motor damage and other phenomena. If the sealing strip is removed and carefully adjusted according to the width of the running opening of the vehicle side door glass and the position of the glass lifter, the problem will be effectively solved. The new F3 has fewer such problems, and the old F3 usually appears more frequently. There are also problems with the glass mud trough of some car owners, which leads to abnormal sound of the window and unsmooth lifting. Spray wax can only play a temporary role in lubrication, so customers had better find 4S to claim for replacement. Our 4S Sheet Metal Group usually adopts the replacement method, which does not exceed 20 minutes at most. Maintenance cost-effective accessories are quite cheap. The most common routine maintenance in daily maintenance is to replace the oil and oil filter, which is also commonly known as "minor maintenance". The maintenance cost of BYD F3 is only about 140 yuan, which is quite economical. Even the independent brand A5 has a small maintenance cost above 200 yuan. In addition, BYD F3' s fuel consumption is not high, and the use cost is as good as the purchase cost performance ratio. BYD has a large proportion of self-made accessories, and its monthly sales volume is maintained at 1 10,000 or even above 20,000 vehicles, so the price of accessories is usually lower than the average level at the same level, even worse than A5 and Vision, both independent brands. What if the clutch and throttle are hard? Many owners of BYD F3 usually envy others that the clutch and accelerator are light after driving other brands, while F3 throttle and clutch feel a little heavy, so driving in the city, especially in traffic jams, will feel very tired. This problem is believed to be the direction that BYD F3 needs to improve. For this problem, the usual solution of 4S is to clean the throttle and lubricate the clutch and throttle cable at the same time. Because the clutch of F3 is not hydraulic and the throttle (throttle) is not electronic, it is easy to cause insufficient lubrication of the cable after a period of use. Of course, we can also adjust the throttle and clutch cable within a proper range according to the user's requirements. This helps to alleviate the problem of heavy clutch of throttle. The key components are made from the products of famous manufacturers. Not only automobile engines are mass products of well-known manufacturers, but also engine EFI system. BYD F3 also adopted the world-famous Delphi supporting products. Like the familiar Bosch EFI products, Delphi EFI also occupies a considerable share of the world. BYD F3 is also one of the few independent brands with automatic gearbox, which is imported from Aisin Japan. The famous Volkswagen 6-speed automatic manual transmission is also provided by Aisin. What if the car stalls? The products provided by big manufacturers are not necessarily completely problem-free. In the early days, many F3 owners reported the problem of flameout. The fault features are very similar. When F3 enters neutral (or upshift or downshift), the engine speed drops sharply, and when the idle speed is 400 -500 rpm, the engine power light flashes and then goes out. Judging from the fault phenomenon, it seems that the throttle valve body of the general EFI vehicle is too dirty or the throttle valve is not working normally because of carbon deposition and glue application. Usually, methods such as removing carbon deposit and glue, cleaning nozzles and checking stepping motors can be used, but it is difficult to explain this problem with carbon deposit for a new car that has only traveled for thousands of kilometers. Through coordinated inspection with the manufacturer, it was finally confirmed that the fault came from the throttle assembly and was related to the related software of the electronic control system. After two improvements, the related problems were finally solved. BYD manufacturers or supporting product suppliers mainly change the bypass flux of stepping motors. Combined with electronic control software and ECU throttle, the problem of engine flameout during gear shifting is solved. Judging from the actual situation, this improvement is quite effective. If the owner has not found this situation before, and it happens occasionally, he must get in touch with 4S and try to solve the problem and eliminate hidden dangers as soon as possible. Cost-effective configuration. As far as the price of BYD F3 is concerned, the space configuration is not bad. The wheelbase of 2600 mm is the mainstream in its class. ABS+EBD, double airbags, 195/60 R 15 tires, four-wheel disc brakes and other configurations are the first independent compact car in F3. What if the antifreeze leaks? Many users reported that F3 antifreeze leaked. If you look closely, you can see that it leaked from four joints between the engine and the water tank. For the current summer, the owner should find it as soon as possible and go to 4S for repair. In fact, you can judge whether the engine antifreeze leaks without opening the engine compartment cover. We can judge according to the normal driving state and the display of the water thermometer. If the engine water temperature rises rapidly in a climate of 30 degrees, it can be judged that there is a leak. If the water thermometer is higher than the usual pointer position, it can also be used as a basis for judging the leakage of antifreeze. If the owner finds abnormal liquid on the ground (excluding air conditioning water and other factors) or liquid on the front half axle of F3 right wheel when parking, it is mostly caused by antifreeze leakage. The problem of water leakage at the four joints between the engine and the water tank is relatively easy to solve, that is, re-tighten the four water pipe buckles. Of course, the tightening torque is also learned: the water pipe buckle may leak antifreeze again because of insufficient torque, but it should not be too large, causing the water pipe to break due to the increase of unit pressure of the buckle. Of course, these data are clearly stated in the technical manuals distributed to various service stations. In the case of high speed and high load, it is necessary to ensure that the circulation speed of coolant increases. The 4G 18 engine assembled in F3 is not easy to be found because of the dust cover. At the service station, the dust cover must be removed to check whether the withholding torque of the water pipe at this position meets the requirements. If the joint is not leaking, it may be that the joint between the water pump and the cylinder is not tightly sealed, so it is necessary to disassemble the water pump and re-seal it. If the water pump is found to be damaged, the service station should claim for replacement for the customer. Personally, I think Jetta is cheap to maintain and low in fuel consumption, which is very good. It belongs to Volkswagen F3, and all the configurations are good, but it is more troublesome to maintain. As for Yue Feng, I don't like it very much, hehe! As for which model to choose, you can consider it according to your own preferences and conditions!