Removal and installation of an engine with an injection system (VAZ-21051)

1. Before removing the engine, it is necessary to remove the pressure in the fuel supply system. To do this, disconnect the electric fuel pump wiring harness connector from the injection system wiring harness, start the engine, let it run until it stops, and then turn on the starter for 3 seconds to equalize the pressure in the pipelines.

2. Disconnect the wire from the negative terminal of the battery.

3. Remove the air filter by unscrewing the nuts securing it to the central injection unit and to the stud on the cylinder head cover, and disconnecting the hoses from the filter. Disconnect the wires from the injector and close the neck of the central injection unit with a technological plug.

4. Disconnect the fuel inlet and outlet hoses from the pipes on the engine.

5. Cover the openings of the tubes and hoses to prevent dirt from getting into them.

6. Disconnect the throttle cable from the central injection unit and from the bracket on the intake manifold.

7. Disconnect the vacuum hoses from the central injection unit that go to the adsorber and absolute pressure sensor, as well as the engine crankcase ventilation system hose.

8. Disconnect the wires from all injection system devices installed on the engine.

9. Then the engine is removed in the usual order. The engine is installed in the reverse order of removal. After installation, adjust the accelerator drive and check the operation of the injection system, as specified in the Central Fuel Injection System Repair Manual.