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



6.4. Measuring instrument of a stream of air

GENERAL INFORMATION

Measuring instrument of a stream of air (L-Jetronic system)

1. Adjusting screw

2. Zaslonka of a measuring instrument

Measuring instrument of a stream of air (Motronic system)

1. Processor block
2. Zaslonka of a measuring instrument
3. Butterfly valve
4. Stream measuring instrument
5. The sensor of temperature of soaked-up air
6. Air purifier

Check, removal, installation

PERFORMANCE ORDER
System of injection of the L-Jetronic type
1. Disconnect from a stream measuring instrument an air line. Check freedom of a course of a zaslonka. At return flashes the zaslonka of a measuring instrument can warp that leads to the wrong reading of resistance of a potentiometer and also to zaslonka jamming. Traction qualities of the engine, and idling the engine глохнет are as a result lost.
2. Disconnect from a stream measuring instrument the socket.
3. Check resistance between conclusions 7 and 8 (in drawing conclusions of the socket of the processor block are shown). In process of zaslonka moving resistance should change smoothly without jumps.
4. Check resistance of the sensor of air temperature in a stream measuring instrument between conclusions 8 and 9. Resistance should be 2200–2700 Ohm.
5. Check a chain from a measuring instrument to the processor block for what switch off ignition, attach the socket to a measuring instrument and disconnect the socket on the processor block (is on the right under the forward panel of salon). Check resistance between conclusions 7 and 8, moving a zaslonka. If results of measurements differ, the reason is malfunction of conducting.
System of injection of the Motronic type
6. Uncover the processor block, it is under the forward panel of salon on the right side (and/m with the left wheel).
7. Check resistance of a potentiometer of a measuring instrument between conclusions 7 and 9 (on early systems).
8. Check resistance of a potentiometer of a measuring instrument between conclusions 7 and 12 (on late systems). In process of zaslonka moving resistance should change smoothly without jumps.

Prevention

The socket of early systems 35-shtyrkovy, on late system Motronic is established the 55-shtyrkovy socket.


9. If resistance does not correspond to norm, check conducting.

Removal and installation (all models)

PERFORMANCE ORDER
1. Disconnect from a measuring instrument the socket.
2. Remove an air purifier. Take away latches and remove an air offtake located in the case of an air purifier.
3. Unscrew nuts and remove a stream measuring instrument.
4. Installation is carried out upside-down.