Fuel line and injectors
Attention. For simplicity and absolute cleanliness during disassembly, the removal of the fuel line is described along with the fuel injectors and pressure regulator.
Depressurize the fuel system and equalize the pressure in the tank to atmospheric pressure by removing the fuel filler cap. Remove the negative terminal from the battery. Loosen the clamps and remove the heated air supply air hose from the exhaust manifold (see fig. 4C.5).
Remove the high voltage wires from the spark plugs and move them to the side.
Remove the nuts and bolt and separate the accelerator cable sheath from the throttle body. Remove the connector from the throttle position sensor.
Unscrew the 4 mounting bolts and remove the throttle body and gasket (see fig. 4C.6).
Disconnect the electrical connectors from the engine temperature sensor and intake air temperature sensor.
Disconnect the electrical connectors from the fuel injectors, then unscrew the 2 mounting bolts and remove the wiring harness from the fuel line (see fig. 4C.7-4C.9).
Unscrew the fuel supply line to the fuel line. Close the holes with plugs.
Disconnect the fuel return hose and vacuum pipes from the pressure regulator.
Unscrew the bolts securing the fuel line and remove it together with the fuel injectors (see fig. 4С.10-4С.12).
Remove the fuel injectors from the fuel line. Remove the top and bottom o-rings from the fuel injectors. All fuel injector O-rings must be replaced, even if only one injector has been replaced.
Before installation, check that the mating surfaces are clean. Lubricate the new fuel injector O-rings with engine oil.
Installation is done in sequence. reverse withdrawal. When reinstalling the fuel line, check that all injectors are correctly positioned.
Start the engine and check the fuel system for leaks.
Fuel pressure control
Depressurize the fuel system and equalize the pressure in the tank to atmospheric pressure by removing the fuel filler neck.
Remove the negative terminal from the battery.
Loosen the fastening clamp and remove the fuel return pipe from the regulator.
Remove the vacuum tube from the regulator (see fig. 4C.13).
Unscrew 2 bolts and remove the regulator. Remove the old o-ring.
Installation is done in sequence. reverse withdrawal. Lubricate the new O-ring with engine oil. After installing the regulator, fuel and vacuum lines, turn on the ignition about 5 times (without engine start) and check the fuel system for leaks.
Idle speed control valve. Remove the negative terminal from the battery.
Disconnect the electrical connector from the valve (see fig. 4С.14).
Unscrew 4 screws and remove the idle speed control valve. Installation is made in sequence, return to removal. Start the engine and check its operation. Warm up the engine to operating temperature and check that the idle speed is stable. Shut off the engine, connect a tachometer in accordance with the manufacturer's instructions, restart the engine and check the idle speed, including all electrical consumers. In all cases, the idle speed must comply with the specifications.
Choke body
Depressurize the fuel system and equalize the pressure in the tank to atmospheric pressure by removing the fuel filler neck.
Remove the negative terminal from the battery.
Loosen the clamp and disconnect the heated air supply pipe from the exhaust manifold.
Disconnect the high voltage wires from the spark plugs and move them to the side.
Remove the nuts and bolt and separate the accelerator cable sheath from the throttle body. Disconnect the vacuum hoses from the intake manifold and fuel pressure regulator. Remove the electrical connectors from the idle speed control valve, temperature sensor, and wiring harness connector. Disconnect the fuel return hose from the pressure regulator. Unscrew bolts of fastening of a throttle and remove the case of throttles together with a lining. Installation is made in sequence, return to removal.
ECU
Remove the negative terminal from the battery.
In the passenger compartment, remove the upholstery from the front lower part on the passenger side and unscrew its side to access the ECU. Release the ECU from the holder, then unscrew the fixing screws and remove the electrical connector. Installation is carried out in sequence. reverse withdrawal.
Intake air temperature sensor
Remove the pipes of the air supply system to the engine. Disconnect the sensor electrical connector. Unscrew the sensor from the intake manifold.
Installation is done in sequence. reverse withdrawal.
Throttle position sensor
Remove the air supply pipes.
Release the mounting bracket and remove the electrical connector from the sensor. Unscrew the screws and remove the sensor from the throttle body. Do not rotate the central part of the sensor in the removed position, as it is very easy to damage it.
Installation is made in sequence, return to removal. At the same time, precisely align the cut on the throttle valve axis with the protrusion on the sensor. Tighten the sensor mounting screws evenly.
Vehicle speed sensor
The sensor is installed at the base of the speedometer drive and is removed from the speedometer drive gear.
Absolute pressure sensor
The sensor is located on the right side of the rear of the engine compartment. Disconnect the electrical connector and vacuum hose from the sensor.
Unscrew the 2 fixing screws and remove the sensor. Installation is done in sequence. reverse withdrawal.
Power steering pressure sensor
Remove the electrical connector from the sensor. Unscrew the sensor. Place a clean rag under the transducer to catch any escaping fluid. Check the condition of the sensor O-ring and replace it if necessary.
Installation is made in sequence, return to removal. Top up the fluid level in the steering system if necessary.
Oxygen sensor
Remove the electrical connector from the sensor wire. Raise the front of the car and secure it on stands. Unscrew the sensor from the front exhaust pipe and remove it from below the vehicle.
Installation is carried out in the reverse order of removal Lubricate the threaded part of the sensor with a non-stick compound.
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