bmw Workshop Repair Guides

BMW Workshop Service and Repair Manuals

3 RA Check Engine Idle Speed And Exhaust Contents (M40, M42, M43, M44) - Vehicle With > < 2 RA Checking Engine Idling Speed And Exhaust Contents, Adjusting If Necessary (M40,
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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.

Remove anti-tamper cap using special tool 13 1 011.

Adjust CO content using adjusting screw on mass air flow sensor.

RA  Checking engine idling speed and exhaust contents, adjusting if necessary (M40,

BMW AG - TIS

28.01.2013  02:25

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

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3 RA Check Engine Idle Speed And Exhaust Contents (M40, M42, M43, M44) - Vehicle With > < 2 RA Checking Engine Idling Speed And Exhaust Contents, Adjusting If Necessary (M40,