In the car, smell can help you identify the car's "fault". A car consists of tens of thousands of components, each part in the normal condition of the smell is very small, but once a part of the parts of the abnormal wear or consumption, it will send out some odor, so, in the car, you may wish to use a nose, timely identification of "wrong" car. If the inside of the car comes the paste of plastic products, most of them are caused by overheating of the electrical circuit. But the burning of electric wires is usually accompanied by local smoke or local fever. Careful inspection can definitely find the source. If the special odour of non-metallic materials is smelled during the running process, the clutch friction disc usually burns or overheat. If the clutch is used normally, there is no obvious difficulty in hanging or starting difficulties, and the smell of the car does not smell from the front of the car, but the rear of the car, then check if there is no overheating. Be careful about the smell of mixed oil. Because the ignition point of engine oil is different from gasoline, it is abnormal that we call it "blue smoke" phenomenon. In addition, engines with severe valve wear are also likely to burn oil. Some of the oil pipes of the vehicle also have an aging leakage and may also drop the oil into the engine or the exhaust pipe, when the smell of oil that emanates may cause a fire. The car should be sent to the maintenance shop for inspection immediately. If you can always smell the smell of unburned gasoline when driving, it is commonly known as "oil raw". It is necessary to take the first time to confirm the location and severity of the oil leaking to get on the road again. After the vehicle is used for a long time, the oil pipeline is likely to suffer from aging and cracking. As long as a little bump or pressure changes in the pipeline, it is possible to leak out of these parts. So when you smell an abnormal gasoline smell, you should immediately extinguish the cigarettes and other bright fires in the car. In addition, if the tank has been hit by an accidental impact (such as the bottom), it is possible to leak unburned gasoline and plug the chewing gum in the oil spill.