Toyota Zhixiang fuel injector pressure relief
The fuel injector is damaged, the atomization of fuel and the mixing of air can not be guaranteed, and the combustible mixture can not be completely burned, which leads to the increase of black smoke in vehicles and carbon deposition in engines. The specific reasons leading to the intermittent lack of cylinder in the engine are as follows: ignition system: the aging of ignition coil and spark plug leads to the failure of the ignition system of the cylinder, and the power is most likely to drop after the ignition coil has problems, which will seriously lead to instantaneous dead fire and automobile failure. Lost cylinder line: No matter whether the cylinder line is working normally or not, unplug the cylinder line directly, plug in the spark plug without any screwdriver, and look at it while driving, so you can understand it by comparing the cylinder.
The injector itself is a normally closed valve (normally closed valve means that the valve is always closed when there is no control signal input; When there is no control signal input, the normally open valve is always open. The valve needle moves up and down to control the opening and closing of the valve. When the ECU sends the fuel injection instruction, its voltage signal will make the current flow through the coil in the fuel injector, generate a magnetic field to attract the valve needle and open the valve, so that the fuel can be ejected from the fuel injection hole. The biggest advantage of jet fuel supply is that the control of fuel supply is very accurate, so that the engine can have the correct air-fuel ratio in any state, which not only keeps the engine running smoothly, but also conforms to the norms of environmental protection laws and regulations.
When the throttle is slightly blocked, this phenomenon will generally occur: when the first gear starts, the car is a little shaky, and when it is put into the high gear to accelerate, this phenomenon disappears again; If all kinds of sensors in the car work normally, the throttle body has been cleaned and the circuit is normal, it is likely that the fuel injector is slightly blocked. However, when accelerating in high gear, slight gum may be sprayed away (dissolved) again, and the performance of the car will be restored. When the fuel nozzle is seriously blocked, such phenomena generally occur: the fuel consumption increases, the engine power decreases, the idle speed is unstable, the acceleration is poor, and it is difficult to start.
If these symptoms appear, you should go to the repair shop in time to check and confirm with computer, and clean the fuel system in time to avoid failure.
To remove the common faults of the choke, the hole plug can be dredged with a penetrating needle, and it should be carefully cleaned after dredging. The large plane of needle valve body is in poor contact with the plane of injector body, or the cylindrical surface of needle valve is seriously worn. If the large plane of needle valve body is in poor contact with the plane of injector body, chromium oxide can be coated on the flat plate for figure 8 grinding; If the cylindrical surface of the needle valve is seriously worn, the needle valve couples should be replaced in pairs. Poor sealing of needle valve and needle valve body leads to poor atomization or oil dripping of injector. This kind of fault can be coated with fine chromium oxide or toothpaste on the sealing belt at the needle end, but never on the cylindrical part. Then insert the needle valve into the needle valve body and turn it while knocking until it is tightened. Chromium oxide or toothpaste must be washed off after grinding.