BMW 3 Series E30

since 1983-1994 release

Repair and operation of the car

+ 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. Air stream measuring instrument
   6.5. Throttle branch pipe
   6.6. Fuel pressure regulator
   6.7. Nozzle of launch of the cold engine and thermotimer
   6.8. Check and replacement of nozzles
   6.9. Air proofreader of idling
   6.10. Order of a decompression of fuel system
   6.11. Check of pressure of fuel
   6.12. The fuel pump, pump of pumping and the fuel level sensor in a tank
   6.13. Fuel pipes and union
   6.14. Fuel tank
   6.15. Air filter
   6.16. Cable of the 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. Useful tips


6.8. Check and replacement of nozzles

Check on the car

1. Check work of nozzles as a stethoscope. Make sure that the frequency of operation of nozzles increases with increase in turns of the engine.
2. If clicks are listened badly, then more exact check is provided with the light indicator. If the indicator shines, but there are no clicks, then the nozzle is faulty.
3. Check nozzle resistance, having disconnected the socket. If resistance of a nozzle does not meet standard, then replace a nozzle.

Bench (imitating) tests of nozzles

These tests are carried out only in car service as the special equipment is required.


1. Open the main socket of conducting of nozzles and remove the soaking-up collector (see subsection 3.1.6).
2. Disconnect hoses from the fuel pressure regulator and turn off bolts of fastening of the regulator.
3. Disconnect sockets from nozzles and remove nozzles.
4. Installation is carried out upside-down. Replace ring laying. Before launch of the engine restore fuel pressure, having inserted into place a safety lock of the pump and having included ignition.