Contents: Control device ↡ Pressure sensor ↡ Throttle switch ↡ Pressure regulator ↡ Air temperature sensor ↡ Cold start injector ↡ Additional air supply valve ↡ Nozzles ↡ Thermo-time switch ↡ Fuel pump and filter ↡
Before removing the units, disconnect the wires from the battery. Disconnect the plugs; do not pull the connecting wires. It is advisable to mark the wires to facilitate subsequent assembly. Check the condition of the rubber protective caps.
Control device
The control unit is located in the lower part of the body under the glove compartment.
Remove the right side of the body trim.
Pull back the spring clip (1) and remove the control unit from the holder (see fig. 151).
Fig. 151. Removing the control device.
Open the clamp securing the wires in the car body.
Remove the plastic cover.
Carefully disconnect the multi-plug from the control unit.
Installation is carried out in reverse order.
Pressure sensor
The pressure sensor is located on the wheel mudguard.
Disconnect the multi-position plug.
Loosen the fastening and remove the hose.
Unscrew the mounting bolts and remove the sensor.
Installation is carried out in reverse order.
Throttle switch
The throttle switch is mounted on the side of the throttle body (see fig. 152).
Fig. 152. Fastening the throttle switch.
Loosen the two mounting screws.
Remove the switch.
When installing the switch, the plug connector must point forward. Secure the switch with screws without applying much force. Check the position of the plug in relation to the connector. The necessary adjustments and connections to the switch must be made at a service station.
Pressure regulator
The pressure regulator is located on the left side of the engine (see fig. 148).
Loosen the pipeline fastenings.
Disconnect the pipes and remove the pressure regulator.
Installation is carried out in reverse order.
Air temperature sensor
The air temperature sensor is installed in the air filter. To remove, disconnect the plug and unscrew the sensor. Install in reverse order.
Coolant temperature sensor. The sensor is screwed into the thermostat housing.
Remove and replace the radiator cap, checking for pressure in the cooling system. Perform the work on a cold engine.
Disconnect the plug from the sensor.
Unscrew the temperature sensor and install a new sealing ring when installing.
Installation in reverse order. Ignition distributor - pulse switch.
The impulse switch is located at the bottom of the ignition distributor (see fig. 137).
Disconnect the multi-position plug.
Unscrew the two mounting screws and remove the switch.
Before installation, lubricate the moving parts with Bosch Ft 1 v 4 grease. No contact adjustment is required. Pay attention to the position of the plug before installation.
Cold start injector
The injector is located on the intake manifold.
Disconnect the plug.
Place a clamp on the fuel hose.
Loosen the clamp and disconnect the hose.
Loosen the mounting bolts and remove the injector.
Installation is in reverse order. When assembling, install a new gasket.
Additional air supply valve
The additional air supply valve is installed on the cylinder head (see fig. 153). Air is supplied to the valve from the air filter through a plastic hose.
Fig. 153. Additional air supply valve.
1 - diaphragm damper,
2 - additional air valve.
Disconnect the hose.
Loosen the mounting bolts and remove the valve.
Installation in reverse order.
Nozzles
The injectors are installed in the intake ports of each cylinder directly in front of the intake valve and are secured in pairs in a holder (see fig. 154). Removing the injectors in pairs.
Fig. 154. Nozzle and holder.
1 - nozzle,
2 - holder,
3 - rubber ring,
4 - mounting ring,
5 - sealing ring,
6 - insulating cap.
Disconnect the plugs.
Disconnect the fuel lines from the injectors.
Loosen the holder mounting nut.
Remove two injectors together with the holder.
When installing, insert the nozzle into the holder and place the rubber ring on the nozzle body from the sprayer side. Check the position of the ring and install the installation ring.
Place the sealing rubber ring on the body. Always replace the ring when overhauling.
Install the holder with two nozzles and tighten the fastening nut to a torque of 10 Nm. Do not damage the sprayer during installation.
Connect the fuel lines.
Install the plug and put on the rubber protective cap.
Thermo-time switch
The thermal time switch is located on the right side of the cylinder head (see fig. 155).
Fig. 155. Thermal-time switch on the M110 engine.
1 - coolant temperature sensor,
2 - temperature switch 100°C,
3 - plug,
4 - thermal-time switch,
5 - thermometer sensor,
6 - reserve,
7 - plug.
Work should be carried out on a cold engine and in the absence of excess pressure in the cooling system.
Disconnect the wires.
Unscrew the switch.
Installation in reverse order.
Fuel pump and filter
The fuel pump and filter are mounted on the body floor panel between the fuel tank and the final drive.
Remove the protective splash guard.
Clamp the fuel hoses to prevent fuel leakage.
Loosen the clamps and remove the hoses.
Disconnect the wires.
Remove the fuel pump or filter.
Installation in reverse order.