BMW 3 series E30

Since 1983-1994 of release

Repair and car operation

6.4. A measuring instrument of a stream of air

THE GENERAL DATA

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

1. The adjusting screw 2. Заслонка a measuring instrument

Measuring instrument of a stream of air (system Motronic)

1. The processor block 2. Заслонка a measuring instrument 3. Throttle заслонка 4. A stream measuring instrument

5. The gauge of temperature of soaked up air 6. An air cleaner

Check, removal, installation

PERFORMANCE ORDER

System of injection of type L-Jetronic 1. Disconnect from a measuring instrument of a stream an air line. Check up course freedom заслонки. At return flashes заслонка a measuring instrument can warp that leads to wrong reading of resistance of a potentiometer and also to jamming заслонки. Traction qualities of the engine, and idling the engine глохнет are as a result lost. 2. Disconnect from a measuring instrument of a stream a socket. 3. Check up resistance between conclusions 7 and 8 (in drawing conclusions of a socket of the processor block are shown). In process of moving заслонки resistance should vary smoothly without jumps. 4. Check up resistance of the gauge of temperature of air in a stream measuring instrument between conclusions 8 and 9. Resistance should be 2200–2700 Ohm. 5. Check up a chain from a measuring instrument to the processor block for what switch off ignition, attach a socket to a measuring instrument and disconnect a socket on the processor block (is on the right under the forward panel of salon). Check up resistance between conclusions 7 and 8, moving заслонку. If results of measurements differ, the reason is malfunction of conducting. System of injection of type Motronic 6. Uncover the processor block, it is under the forward panel of salon on the right side (а/м with the left wheel). 7. Check up resistance of a potentiometer of a measuring instrument between conclusions 7 and 9 (on early systems). 8. Check up resistance of a potentiometer of a measuring instrument between conclusions 7 and 12 (on late systems). In process of moving заслонки resistance should vary smoothly without jumps. The prevention The socket of early systems 35-shtyrkovyj, on late system Motronic is established 55-shtyrkovyj a socket. 9. If resistance does not correspond to norm check up conducting.

Removal and installation (all models)

PERFORMANCE ORDER

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