汽车维修初学基本知识大全（Basic knowledge of car maintenance beginner）.docVIP

汽车维修初学基本知识大全（Basic knowledge of car maintenance beginner） Basic knowledge of car maintenance beginners Simple repair of car body abrasion The fenders and the lower part of the body often have a lot of scratches and scratches, because the wound is very small, and even owners do not know when it was scratched. These scars should be repaired as soon as possible so as to prevent the wounds from sticking to the dirt. This can be painted or painted with commercially available paint and will soon be repaired. Use grinding and polishing material to finish small scars and then coat with paint. Although it can be seen that the newly patched paint, but do not worry about corrosion. Its very simple to sell a sticker on the market. Posting the paint is perfect for the bumper scar. According to the needs of the post paint cut the appropriate size, post operation is very simple and convenient, after the posting effect is also very good, indifferent to often dont see the scars too. Matters needing attention in use and maintenance of EFI engine The microcomputer control system of EFI engine is more complex, and the high voltage and high temperature are very sensitive, we should pay attention to the following points: 1 no matter whether the engine is running or not, as long as the ignition switch is switched on, never disconnect the electrical device that is working on the 12V. Because of the disconnection of these devices, the self inductance of any coil produces a very high instantaneous voltage, possibly exceeding 7000V, which severely damages the microcomputer and the sensor. The following is not part of the electrical disconnect device: any battery cable, mixture control solenoid valve, idle control device (step motor), electronic fuel injector, two air injection solenoid valve (solenoid valve pump), wire, microcomputer ignition device PROM (programmable read-only memory), any computer wire and wire connectors and blower air conditioning clutch wire etc.. The 2, cross start othe