Fuel pump of carburetor engines

On the cars equipped with carburetor engines, the fuel pump is located on the left side of the block of cylinders, near an arm of an oil filter and is put in action by an intermediate shaft.

Carry out check of serviceability of the fuel pump in the following order:

Fig. 5.14. Fuel pump of the carburetor engine: 1 – remote laying of the fuel pump; 2 – sealing ring; 3 – fastening bolt; 4 – fuel pump; 5 – collar; 6 – a hose from the filter to the pump; 7 – fuel filter; 8 – a hose from a fuel-supply line to the filter; 9 – fuel-supply line; 10 – tube of the return discharge of a tpliv; 11 – a hose from the tank to a tube of the return discharge; 12 – fuel tank; 13 – a hose from the tank to the carburetor; 14 – carburetor; 15 – arm of the fuel tank; 16 – a hose from the pump to the tank

– weaken a collar 5 (see fig. 5.14 );

– disconnect from the pump 4 a hose 16;

– several times press the pump drive lever. If from the pump when pressing the lever fuel pours out, so the pump is serviceable;

– otherwise the pump is subject to repair.

Fuel pump of vpryskovy engines

Fig. 5.12. The fuel tank and the fuel pump of cars with the SOHC engine: 1 – cover of a bulk mouth; 2 – lock ring; 3 – rubber sealant; 4 – connection of the tire of grounding, 5 – a broad tank; 6 – fuel supply union; 7 – flange nut; 8 – fuel return union; 9 – cover; 10 – consolidation; 11 – hose; 12 – consolidation; 13 – washer; 14 – rubber dampers, 15 – the fuel pump; 16 – casing of the fuel pump; 17 – lock ring; 18 – the fuel level sensor, 19 – consolidation; 20 – bolt; 21 – fastening tire; 22 – ventilation valve; 23 – tube of a sapun (Station wagon); 24 – tube of a sapun; 25 – bolt; 26 – consolidation; 27 – a hose to the coal filter; 28 – valve

On the cars equipped with engines with system of injection, the fuel pump can be installed in the fuel tank or outside before a tank behind the fuel filter on the right side (fig. 5.12 and 5.13) .

On cars with SOHC engines the fuel pump is installed in the fuel tank.

On cars with DOHC engines one fuel pump is installed in the fuel tank, and the second pump is installed behind the fuel filter. Access to the pump can be got after a raising of a back part of the car and removal of the lower protection.

Carry out check of serviceability of the fuel pump in the following order:

– check serviceability of a safety lock in a chain of the fuel pump;

– disconnect a high-voltage wire from the ignition distributor (an average wire) and connect it to weight, if necessary using an additional piece of a wire;

– include a starter, at the same time the pump has to rustle monotonously;

– if noise during the operation of the pump is absent, remove the relay of the fuel pump and connect contact of the relay with the positive plug of the rechargeable battery. If the pump begins to work, the relay is faulty and it needs to be replaced. If the pump does not work, check electric wires to the pump;

– if the pump works, but fuels less norm probably moves the fuel filter got littered. If the pump is faulty, it needs to be replaced.

Carry out removal and installation of the fuel pump installed in a tank in the following order:

– disconnect a wire from the negative plug of the rechargeable battery;

– disconnect fuel hoses from giving 6 (see fig. 5.12 ) and returnable 8 unions;

– disconnect electric wires from a cover 9;

– turn off and remove a big flange nut of the 7th fastening of a cover;

– uncover 9 and a sealing ring 10;

– take the fuel pump 15 and a casing 16 of a tank. The pump and a casing are removed with the sensor of the index of level of fuel 2;

You carry out installation to the sequences, the return to removal.

Replace consolidations of the pump. At screwing up of a big flange nut when fastening the pump in a tank check that the cover 9 reached a certain position when strelochka on unions (the direction of a stream) coincide with the corresponding hoses.

Carry out removal and installation of the fuel pump installed outside in the following order:

– disconnect a wire from the negative plug of the rechargeable battery;

– enclose rags under a pressure head hose in a motor compartment;

– slowly weaken connection and take off pressure in fuel system;

– repeatedly delay connection;

Fig. 5.13. The fuel tank and the fuel pump of cars with the OOSN engine: 1 – nut; 2 – stopper; 3 – adapter; 4 – valve; 5 – fastening ring; 6 – fuel pump; 7 – consolidation; 8 – filter; 9 – a fuel-supply line to the distributor; 10 – connecting coupling; 11 – fuel filter; 12 – arm; 13 – rubber damper; 14 – nut; 15 – spring bracket; 16 – returnable tube; 17 – the pipeline union from the soaking-up pump; 18 – fuel return pipeline union; 19 – pressure accumulator; 20 – pump tank; 21 – bolt

– for access improvement, turn off four nuts 17 (see fig. 5.13 .) also lower an arm of the 20th pump;

– disconnect the electric socket from the fuel pump;

– weaken a ring 10 and slowly remove the pump;

– remove consolidation 8 and the fuel mesh filter 7. Consolidation is subject to replacement. The mesh filter needs to be washed out in pure gasoline.

PREVENTION Operation of the fuel pump is forbidden if in it there is no fuel as it can lead to failure of the pump and even to its ignition.

You carry out installation to the sequences, the return to removal. Replace a sealing ring, before installation having moistened it in gasoline.