bmw Workshop Repair Guides

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31 Fuel Pump With Drive And Line > < 1 RA Check Engine Idle Speed And Exhaust Contents (M40, M42, M43, M44) - Vehicle With
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Measure exhaust content in front of catalytic converter.

M42:

Disconnect plug-in connection to oxygen sensor and remove
sensor.

Install special tool 1 0 094 in threaded neck of oxygen sensor.

M40, M43:

Unscrew bolts. Connect special tool 13 0 092 to exhaust
manifold.

Connect measuring sensor of exhaust tester to special tool
13 0 092.

Check CO contents.

Switch off exhaust extraction system for time of testing.

3) Note:

Before correcting the exhaust/idle setting, first ensure that
there is no malfunctions on the engine, in the ignition system
or the fuel injection system.

For example, if the exhaust/idling speed value is too high:

Check injector nozzles.

Check fuel delivery pressure.

Check coolant-temperature sensor.

Check air intake system for leaks.

Check idling speed valve.

For example, if the exhaust/idle value is too low:

Check hoses and connections for idling speed control and

localize the air leak.

Check air intake system for leaks.

Check idling speed valve.

RA  Check engine idle speed and exhaust contents (M40, M42, M43, M44) - vehicle with

BMW AG - TIS

21.01.2013  02:51

Issue status (12/2007) Valid only until next DVD is issued

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31 Fuel Pump With Drive And Line > < 1 RA Check Engine Idle Speed And Exhaust Contents (M40, M42, M43, M44) - Vehicle With