E30 series BMW 3

since 1983-1994 of release

Repair and car operation



E30 BMW
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engine
+ 4. Cooling system
+ 5. Heating and ventilation
- 6. Fuel system
   6.2. Specifications
   6.3. Check of system of injection
   6.4. Measuring instrument of a stream of air
   6.5. Throttle branch pipe
   6.6. Regulator of pressure of fuel
   6.7. Nozzle of start-up of the cold engine and thermotimer
   6.8. Check and replacement of nozzles
   6.9. Air proof-reader of idling
   6.10. Order of a decompression of fuel system
   6.11. Check of pressure of fuel
   6.12. The fuel pump, the pump of pumping and the fuel level sensor in a tank
   6.13. Gasoline pipe lines and union
   6.14. Fuel tank
   6.15. Air filter
   6.16. Cable of a drive of a butterfly valve
   6.17. Carburetor
+ 7. Exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
+ 14. Good advice



6.12. The fuel pump, the pump of pumping and the fuel level sensor in a tank

GENERAL INFORMATION

Fuel pump of early system of injection of Motronic

1. Clamping washer

2. Fuel level sensor

3. Laying

4, 11. Hose

5. Holder

6. Pump

7. Filter

8. Block

9. Control valve

10. Suppressor of pulsations

Fuel pump (the carburetor engine)

PERFORMANCE ORDER
1. Disconnect the battery from weight, disconnect from the pump hoses, unscrew 2 nuts of fastening of the pump.
2. Remove the pump, if necessary displace the pump in easy blow on wooden whetstone.
3. Remove 2 laying.
4. The pump not folding and to repair is not subject. Installation is carried out upside-down. Replace laying from both parties of a pro-rate of the pump, without breaking their thickness.

Fuel pump (the injector engine)


Prevention

In system of injection of L-Jetronic the pump of pumping is mounted near a tank, in Motronic system this pump is mounted in a fuel tank. The fuel level sensor is mounted in a fuel tank on the pump of pumping or on the fuel pump.


PERFORMANCE ORDER
Execute a decompression and disconnect the battery from weight.

The fuel pump mounted out of a tank

PERFORMANCE ORDER
1. Lift the car.
2. Remove a cover and disconnect from the wire pump.
3. Press clips fuel hoses of the pump and disconnect them on the pump.
4. Unscrew screws of fastening and remove the pump. Installation is carried out upside-down.

The fuel pump mounted in a tank (or the pumping pump)

PERFORMANCE ORDER
1. Unscrew screws and remove the hatch (is under a back seat or under a rug in a luggage carrier, depending on model).
2. Disconnect sockets of the pump of pumping (1) and the fuel level sensor (2) in early system of injection of Motronic.
3. For a detachment of the socket hook a bracket so that dredging was combined with a groove on a latch and dissolve parts of the socket.
4. On a part of cars to take the pump with the sensor it is necessary to turn this knot counter-clockwise.
5. On a part of cars the pump knot with the sensor fastens these nuts.
6. In early system of injection of Motronic at first get the fuel level sensor, then get the pump, without disconnecting hoses.
7. On early models unscrew fastening screws, take away brackets and remove the pumping pump.
8. Installation is carried out upside-down. If necessary replace laying between the pump and a fuel tank.

Fuel level sensor

Fuel level sensor conclusions in late system Motronic

1. Mass of the sensor

2. To a control lamp

3. Sensor

4. Mass of the pump

5. Pump

PERFORMANCE ORDER
1. Remove the pump with the sensor.
2. In system of injection of L-Jetronic and in early system Motronic check resistance between the specified conclusions according to the table. Of late system Motronic be convinced that resistance between conclusions 1 and 3 decreases at a raising of a plunzher of the sensor.
3. If resistance differs, the sensor replace.
4. Installation is carried out upside-down.

Fuel level sensor conclusions

CONCLUSIONS
PROVISION OF THE FLOAT OF THE SENSOR
RESISTANCE, OHM
G and 31
Slow movement from the situation EMPTY to the situation FULL (full) EMPTY FULL
Slowly decreases 71,7 (± 2,3) 3,2 (±0,7)
W and 31
EMPTY (fire of a control lamp of level of fuel)
Gap