2. Since fuel pressure remains in the fuel system after the engine has stopped, the pressure must first be removed. To do this, disconnect the injection system harness wiring block from the electric fuel pump wiring block. Start the engine and let it run until it stops.
3. Turn on the starter for three seconds to relieve pressure in the fuel lines. Reconnect the electric fuel pump wires to the injection system wiring harness. Disconnect the wire from the negative terminal of the battery. Remove the air filter and disconnect the throttle cable from the central injection unit.
4. Disconnect the fuel lines from the central injection unit and plug the ends of the fuel line tubes to prevent fuel leakage.
5. Disconnect the electrical wires from sensor 4 (see Fig. Central injection unit) the position of the throttle valve, injector 2 and idle speed regulator 9.
6. Remove the vacuum hoses from the central injection unit pipes that go to the adsorber and absolute pressure sensor, as well as the engine crankcase ventilation system hose. In doing so, pay attention to the correctness of their connection during subsequent assembly.
[The original source is published on the website: VAZBOOK.RU]
7. Loosen the mounting studs and remove the central injection unit with the sealing gasket from the intake pipe. Close the intake pipe inlet with a plug to prevent any objects from getting in.
8. Install the central injection unit in the reverse order. Pay attention to the condition of the sealing gaskets. After installation, check the fuel supply pressure.
Attention! The sealing gasket installed under the central injection unit and the fuel line sealing rings cannot be reused.