2.5.5. Procedure of dumping of pressure of fuel

Fig. 2.225. Flowchart of a fuel supply system: 1 – fuel tank; 2 – fuel pump; 3 – fuel filter; 4 – fuel cut-off valve; 5 – the valve of adjustment of pressure in the fuel tank; 6 – to the filter of system of catching of vapors of gasoline; 7 – the giving fuel-supply line; 8 – return fuel-supply line; 9 – fuel stage; 10 – fuel nozzle; 11 – fuel pressure regulator; 12 – to an inlet collector (the vacuum channel)

Fig. 2.226. Elements of fuel system: 1 – fuel tank; 2 – fuel pump assembled; 3 – ventilating hose; 4 – cover of a jellied mouth of the fuel tank; 5 – the giving fuel-supply line; 6 – plait of wires of the fuel pump; 7 – line of removal of vapors of fuel; 8 – to the filter of system of catching of vapors of gasoline; 9 – to a fuel stage; 10 – steam separator; 11 – bolt of the fuel pump (6 pieces); 12 – bolt of the fuel tank (4 pieces); 13 – return fuel-supply line; 14 – tank protector; 15 – fuel cut-off valve; 16 – bilateral backpressure valve; 17 – laying; 18 – sealing ring; 19 – overlay of a belt of the fuel tank; 20 – fuel pump; 21 – fuel filter assembled; 22 – fuel level sensor (index of the fuel level sensor)

ATTENTION This work should not be performed if the engine hot. Otherwise, it can exert adverse impact on catalytic converter.

Make sure that the engine cooled down and dump fuel pressure as follows.

Transfer the gear shifting lever to neutral situation (the selector lever in situation "P" for models with the automatic transmission), slow down the car the parking brake system of set and record driving wheels.

Uncover the relay block.

Fig. 2.227. Relay of the fuel pump

Take out the relay of the fuel pump 1 of the block of the relay (fig. 2.227).

Uncover the fuel tank to dump pressure of vapors of fuel, then again establish it into place.

Start the engine and let's it work to a stop due to the lack of fuel. Repeat launch of the engine 2-3 more times (during about 3 about every time) to dump fuel pressure in fuel-supply lines. Now connections of fuel system can be served safely.

After completion of service, insert on the place in the block of the relay of the fuel pump 1 and establish a relay block cover.