The separator is fixed with self-tapping screws in the niche of the right rear part of the body. It is connected by hoses and pipelines to the adsorber in the engine compartment. In the sections of the hose near the separator, gravity and two-way valves are installed, as well as a tee connected to the fuel vapor release hose. The latter goes outside the body near the filler neck, and a safety valve is installed in its section. Fuel vapors from the tank are partially condensed in the separator, the condensate is drained back into the tank.
The remaining vapors pass through the gravity and two-way valves and enter the adsorber. The gravity valve prevents fuel from flowing out of the tank when the car rolls over, and the two-way valve prevents excessive increase or decrease in pressure in the fuel tank.
In the adsorber, fuel vapors are absorbed by activated carbon. The second fitting of the adsorber is connected by a hose to the throttle assembly, and the third - to the atmosphere. When the engine is off, the latter is blocked by a solenoid valve, and in this case the adsorber does not communicate with the atmosphere. When the engine is started, the injection system controller starts to supply control pulses to the valve at a frequency of 16 Hz. The valve communicates the cavity of the adsorber with the atmosphere and the sorbent is purged: gasoline vapors are sucked out through the hose and the throttle assembly into the receiver and then into the engine cylinders. The greater the air consumption by the engine, the longer the duration of the control pulses, the more intense the purge.
The fuel pump is electric, submersible, rotary, structurally combined with sensors for the fuel level and its reserve balance in the tank. It is mounted on studs at the top of the fuel tank. The pump is turned on at the command of the injection system controller (with the ignition on) through a relay. From the pump, through hoses and pipelines located under the bottom, fuel is supplied under pressure to the fine filter in the engine compartment and then to the fuel rail.
The fuel fine filter is non-separable, in a steel case, with a paper filter element, located on the left side of the engine compartment. An arrow is marked on the filter housing, which must coincide with the direction of fuel movement.
The fuel rail serves to supply fuel to the injectors and is fixed to the intake manifold. It has a fuel pressure gauge on it (from the side facing the engine shield) and pressure regulator. The latter changes the pressure in the fuel rail in the range from 2.8 to 3.2 bar (2.8–3.2 atm) depending on the vacuum in the receiver, maintaining a constant pressure difference between them. This is necessary for accurate dosing of fuel by injectors.
The fuel pressure regulator is a fuel valve connected to a spring loaded diaphragm. The valve is closed by spring force. The diaphragm divides the regulator cavity into two isolated chambers - «fuel» and «air». «aerial» connected with a vacuum hose to the receiver, and «fuel» – directly with the ramp cavity. When the engine is running, the vacuum, overcoming the resistance of the spring, tends to retract the diaphragm, opening the valve. On the other hand, fuel presses on the diaphragm, also compressing the spring. As a result, the valve opens and part of the fuel is bled through the drain pipe back into the tank. When you press the pedal «gas» the vacuum behind the throttle valve decreases, the diaphragm closes the valve under the action of the spring, and the fuel pressure increases. If the throttle valve is closed, the vacuum behind it is maximum, the diaphragm pulls the valve more strongly - the fuel pressure decreases. The differential pressure is set by the spring stiffness and the dimensions of the valve opening and cannot be adjusted. The pressure regulator is non-separable; if it fails, it is replaced.
The injectors are solenoid valves that allow fuel to pass when energized and lock under the action of a return spring when de-energized. At the nozzle outlet there is a sprayer through which fuel is injected into the intake pipe. The nozzles are sealed in the rail with rubber rings, it is recommended to replace them every time the nozzle is dismantled.
The injection system controller controls the injectors. In the event of an open or short circuit in the winding, the nozzle must be replaced. In case of clogging, the nozzles can be washed at a special service station stand without dismantling them.
The plastic air filter housing is mounted in the rear right side of the engine compartment on three rubber holders. The filter element is paper. After the filter, the air passes through the mass air flow sensor and enters the intake hose leading to the throttle assembly. The throttle assembly is fixed on the receiver. Pushing on the pedal «gas», the driver opens the throttle slightly, changing the amount of air entering the engine, and hence the combustible mixture - after all, the fuel supply is calculated by the controller depending on the air flow. When the engine is idling and the throttle is closed, air enters through the idle air control, a metering valve controlled by the controller. The latter, by changing the amount of air supplied, maintains the set idle speed. The regulator is non-separable, in case of failure it is replaced.