Table of contents: Fuel line and injectors 🠇 Fuel pressure regulator 🠇 Throttle position potentiometer 🠇 Electronic control unit (ecu) 🠇 Idle Speed Control Motor 🠇 Manifold absolute motion sensor 🠇 Incoming air temperature sensor 🠇 Crankshaft position sensor 🠇 Vehicle speed sensor 🠇 Knock sensor 🠇 ECU system relay 🠇
Attention! When working on the fuel system, it is necessary to first relieve the pressure in the system.
Fuel line and injectors
Removal
1. Disconnect the negative battery terminal.
2. Remove the vacuum line from the fuel pressure regulator (indicated by the arrow).
3. Remove the fuel supply and return hoses from the fuel line.
4. Disconnect the electrical connectors and hoses from the front of the fuel line.
5. Remove the electrical connectors from the fuel injectors.
6. Unscrew the mounting bolts (indicated by arrows) fuel line and remove it from the intake manifold. Remove the seal from each injector.
7. Remove the injectors from the fuel line and remove the upper O-rings, which must be replaced with new ones.
Installation
1. Installation is carried out in the reverse order of removal.
2. Please consider the following points:
- install new O-rings on the injectors;
- to facilitate installation, lubricate the O-rings with engine oil and install the injectors and fuel line in place so that none of the O-rings are displaced;
- start the engine and check the fuel system for leaks.
Fuel pressure regulator
Removal
1. Disconnect the negative battery terminal.
2. Disconnect the vacuum tube from the regulator.
3. Place a clean rag under the regulator, loosen the clamp and remove the fuel regulator from the line.
Installation
Installation is carried out in the reverse order of removal.
Throttle position potentiometer
Removal
1. Loosen the clamp and remove the electrical connector from the potentiometer.
2. Remove the two screws and remove the potentiometer from the throttle shaft.
Installation
Installation is carried out in the reverse order of removal.
Electronic control unit (ecu)
The ECU is located in a plastic box, which is mounted on the front right side member.
Removal
1. Before removing the ECU box cover, make sure the ignition is off. On models with an automatic transmission, there are two ECUs in the box. The unit that controls the fuel and ignition system is located closer to the engine.
2. Disconnect the electrical connector by first lifting the locking lever at the top of the connector. Remove the connector from the rear, disconnect the front and remove the ECU from the pins.
3. Lift the ECU unit up and remove it from the vehicle.
Installation
Installation is carried out in the reverse order of removal.
Idle Speed Control Motor
Removal
1. The idle speed control motor is located on the side of the throttle body.
2. Release the bracket and remove the connector from the engine.
3. Remove the two screws and remove the idle speed control motor.
Installation
Installation is carried out in the reverse order of removal.
Manifold absolute motion sensor
The sensor is located on the intake manifold.
Removal
1. Remove the electrical connector and vacuum hose.
2. Remove the sensor from the manifold.
Installation
Installation is carried out in the reverse order of removal.
Incoming air temperature sensor
Removal
The inlet air temperature sensor is located on the back side of the intake manifold.
1. Remove the electrical connector.
2. Unscrew the sensor and remove it from the vehicle.
Installation
Installation is carried out in the reverse order of removal.
Crankshaft position sensor
The crankshaft position sensor is located on the front side of the clutch housing.
Removal
1. Trace the wiring from the sensor to the wiring connector and disconnect it from the main harness.
2. Unscrew the mounting bolt and use a lever to remove the sensor from the rubber sealing ring.
Installation
Installation is carried out in the reverse order of removal.
Vehicle speed sensor
The vehicle speed sensor is an integral part of the speedometer drive.
Knock sensor
The knock sensor is screwed into the front of the cylinder block.
Removal
1. To access the sensor, apply the handbrake and raise the front of the car. Remove the splash guard from under the engine.
2. Trace the wiring from the sensor to the wiring connector and disconnect it from the main harness.
3. Unscrew the bolt securing the sensor to the cylinder block and remove the sensor from under the vehicle.
Installation
Installation is carried out in the reverse order of removal.
ECU system relay
The ECU relay is located in a plastic box, which is mounted on the front right side member.
Removal
1. Check that the ignition is off and remove the gearbox cover.
2. Disconnect the electrical connector and remove the relay from the mounting plate.
Installation
Installation is carried out in the reverse order of removal.