Throttle body (throttle body) is to control how much of a suction valve engine. Is a circular steel, the middle of a shaft, and the throttle cable to connect by cable throttle control. Throttle body is the engine intake system on a device. Throttle body is generally divided into three parts: actuator, throttle and throttle position chip (throttle body) set the sensor, they are generally packaged as one. Emissions from the edge of the pipes back up to a certain emission standards. Are usually aluminum body, a small amount of plastic, such as BYD and so on.
   
    Add here is that the throttle body will appear in the course of coke, (coke dust particles in the air) will result in too much carbon in idling cars appear on the idle instability.

    Inspection and cleaning the throttle body

    EFI engine running, combustible gas produced in the combustion cylinder of gas, there will be a small part through the intake valve, the intake pipe in the throttle body at the deposit formation. Turn off the engine, the intake pipe of the oil vapor will condense into liquid accumulated in the throttle body. In addition, the air in through the air filter, especially with longer air filter, the filter is not clean impurities left in the throttle body (throttle body) in the. The amount of dirt is not large, but add up over time will be in the throttle body at the formation of fouling, resulting in increased throttle switch resistance, engine idle speed instability and other failures. Therefore, disassembly, cleaning the throttle body is a modern vehicle maintenance in a basic operating program. On the Citroen AX (automatic type) car throttle body dismantling, cleaning process is as follows:

    1 Remove the air filter assembly;

    2 Remove the throttle cable. First, tighten the throttle control mechanism to the maximum position, Banzhu with his left hand, right hand and hold the throttle cable, remove it from the control mechanism of the gap on at the off. Then remove the bracket from the throttle cable pull, remove the limit clamp and gasket, take good care of in a safe location. Finally, fixed in the throttle body (throttle body) on the throttle cable bracket removal out;

    3, unplug the throttle position sensor wiring harness plug. The throttle position sensor has two plugs, one plug and the engine computer is connected to the white, blue plug with automatic transmission connected to the computer. Press the clamp on the plug, respectively, you can unplug the plug. Unplug after the clips back to original position. Also do not forget to preheat the intake valve device plug unplug the power supply wiring harness. This plug is black, and its wiring harness and throttle position sensor wiring harness together;

    4 Use a hex wrench to loosen the throttle body on the three fastening bolts, remove the throttle body;

    5 Remove the throttle body and air filter occupies a position of the sealing gasket to prevent corrosion detergent apron, apron so swollen, broken. Remove the sealing gasket, check whether there is aging, signs of cracks;

    6, cleaning the throttle body. In the cleaning work, the best first removed the throttle body (throttle body) on the throttle position sensor, to prevent the cleaning agent on the throttle position sensor corrosion and damage. However, in the demolition of the throttle position sensor should be careful, it's coated with a fastening screw thread locking adhesive, easy to twist, twist, when not too much force to prevent thread damage, causing the sensor scrapped, not to the user necessary losses. If you do not throttle position sensor can also be removed, just cleaning careful not to spray the cleaning agent on it. Cleaning, focusing on cleaning the throttle body cavity, throttle and throttle shaft and other parts, until there is no dirt so far. After washing repeatedly pulled the throttle control mechanism, check the throttle switch is comfortable. Also, clean the throttle body inlet and joints, remove the sealing gasket before cleaning to prevent corrosion;

    7, the cleaning, inspection finished, install the throttle body. If the throttle position sensor has been removed, it is first installed on the throttle body. Note that the installation mark on the sensor and the throttle body should be marked on the positive. The sealing gasket on the intake manifold reset, install the throttle body to intake manifold. Fastening bolt tightening torque of 5N · m;

    8, install throttle position sensor plug. Installation should note that the white on white, blue to blue. Will plug the device into the air preheating also returned in place;

    9, install the throttle body (throttle body) on the throttle cable bracket and tighten;

    10, install the throttle cable, installation and removal process is reversed, the installation should be checked after adjustment of throttle cable tightness. Throttle cable should have a certain degree of freedom, but this freedom should not be too large, otherwise it will have slower acceleration response phenomenon. Generally limit the throttle cable clamp before you can leave the teeth 1-2;

    11, install the air filter assembly;

    12, the entire installation process is complete, connect the Beverly-specific detector Proxia, accelerator pedal position is initialized to the set;

    13, in the disassembly process, is strictly prohibited on the throttle position adjustment screw cap removed the ban on moving, adjust the throttle position.