Fuel injection and ignition control system (VW Polo 3)

Fig. 3.28 a. Location of fuel injection system components:
1 - 4-pin wiring connector; 2 - Oxygen sensor; 3 - Intake manifold pressure sensor with intake air temperature sensor; 4 - Throttle body; 5 - Knock sensor 1; 6 - Ignition coil; 7 - Fuel line; 8, 13-Connection to the "ground"; 9 - Engine control unit; 10 - Fuel pressure regulator; 11 - Ignition distributor; 12 - Central connector; 14 - Coolant temperature sensor; 15 - Nozzle; 16 - Air filter; 17 - Spark plug; 18 - Oil pressure sensor; 19 - Solenoid valve 1 activated carbon filter; 20 - Activated carbon filter.

Fig. 3.28 b. Location of fuel injection system components:
1 - To the connecting pipe for heating the inlet air on the exhaust manifold; 2 - To the oil separator; 3 - Air filter; 4 - 4-pin wiring connector for intake manifold pressure sensor with intake air temperature sensor; 5 - 8 pin throttle body wiring connector; 6 - Electrical wiring guide; 7, 15, 30 - Bolts; 8 - High pressure fuel line with injectors; 9 - To the fuel drain line; 10 - Adapter for the injection fuel line; 11 - To the power steering servo; 12 - Vacuum tube; 13 - Fuel injection line; 14 - Fuel drain line; 16 - Intake manifold; 17, 19 - Sealing rings; 18 - Thermostat housing; 20 - Coolant temperature sensor; 21, 28 - Wiring connectors; 22 - Retainer; 23 - Oxygen sensor; 25 - 4-pin oxygen sensor wiring connector; 26 - To the fuel tank; 27 - Mounting plate; 29 - Engine control unit.

Fig. 3.28 c. High pressure fuel line with injectors:
1 - High pressure fuel line, 2, 3 - Fasteners; 4 - Fuel pressure regulator; 5 - Sealing ring; 6 - Nozzle.

Fig. 3.28 g. Intake manifold:
1 - Intake manifold pressure sensor with intake air temperature sensor; 2, 5 - Sealing rings; 3 - Intake manifold; 4 - Throttle body; 6 - Bolt; 7-Connection to "ground"; 8 - Fuel injection line; 9 - Fuel drain line; 10 - To the electromagnetic valve 1 of the activated carbon filter; 11 - Retainer.

Fig. 3.28 d. Location of ignition system elements:
1-Connection to "ground"; 2 - Wiring connector; 3 - Nut; 4 - Ignition coil; 5 - Noise suppressor (0.6-1.4 kOhm); 6 - Shielding cover; 7 - Distributor cap; 8 - Rotor (runner); 10 - Cylinder #1 mark; 11 - Ignition distributor with Hall sensor; 12- Sealing ring; 13 - Bolt; 14 - Knock sensor 1; 15 - Spark plug; 16 - Spark plug tip; 17 - High voltage wires.

Fig. 3.28 e. Location of ignition distributor elements:
1 - Distributor shaft with Hall sensor rotor; 2 - Sealing ring; 3 - Bolt; 4 - Plastic washer; 5 - Adjusting shims; 6 - Hall sensor; 7 - Distributor housing; 8 - Cotter pin; 9 - Coupling.