JAC Ruifeng trembles in slow motion. This situation is mainly caused by the dirty throttle valve. It is necessary to go to the repair shop to clean the throttle valve. Under normal circumstances, excessive carbon deposits in the intake system, such as the throttle valve, will cause JAC Ruifeng to shiver at idle. This is a relatively common cause. If this is ruled out, you can check the car's fuel pressure and fuel spray from the injector. If the fuel pressure is too low or the fuel spray from the injector is not good, this can occur. There is also the operating performance of the ignition system and the possible existence of a malfunction. The occurrence of vibration at idle is partly due to the poor performance of the high-voltage wire of the spark plug and ignition coil, and the other is due to poor performance. of the valveof idle speed regulation itself. You can go to the 4S store to have it checked. The car undergoes a full inspection.
Million Car Purchase Grant
The EGR valve is usually opened under the following conditions: 1. The engine is hot and running. 2. Speed exceeds idle speed. If it is not used, it may first affect the air intake volume, but it will not be obvious. Second, if the high temperature gas is not circulated for a long time, it may cause corrosion or even rupture of the EGR cooler. In this way, cooling water will enter the cylinder, causing white smoke, insufficient power and many other problems.
In addition, from a health point of view, it is really recommended to use it properly.
Let me briefly explain the meaning of EGR: it is an exhaust gas recirculation systemement, an exhaust gas purification device implemented to target the nitrogen oxide compound NOx, one of the harmful engine gases. exhaust.
When nitrogen oxides are released into the air and encounter ultraviolet rays, photochemical smog will be generated which causes eye pain and, in severe cases, difficulty breathing. Breathing air polluted for a long time by nitrogen oxides and black smoke can also easily cause respiratory diseases and cancer.