2. Since fuel pressure remains in the fuel system after the engine is stopped, the first thing to do is to remove the pressure. To do this, disconnect the block of wires of the harness of the injection system from the block of wires of the electric fuel pump. Start the engine and let it run until it stops.
3. Operate the starter for three seconds to relieve pressure in the fuel lines. Reconnect the fuel pump wires to the injection system wiring harness. Disconnect the wire from the terminal "minus" 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 lines to prevent fuel leakage.
5. Disconnect electrical wires from sensor 4 (see fig. Central injection unit) throttle position, injector 2 and idle speed controller 9.
6. Remove the vacuum hoses leading to the adsorber and the absolute pressure sensor, as well as the hose of the crankcase ventilation system, from the nozzles of the central injection unit. At the same time, pay attention to the correctness of their connection during subsequent assembly.
7. Unscrew the mounting studs and remove the central injection unit with the gasket from the inlet pipe. Close the inlet of the inlet pipe with a plug to prevent any objects from entering.
8. Install the central injection unit in reverse order. At the same time, pay attention to the condition of the seals. After installation, check the fuel supply pressure.
Attention! The sealing gasket installed under the central injection unit and the sealing rings of the fuel lines cannot be reused.