13 00 050 - Engine performance - check / adjust < 13 - Fuel System < BMW 728 - 745i
 
From model '83
CHECKING/ADJUSTING ENGINE PERFORMANCE
(9.84...9.85)

Requirements for ALL Adjustments:
Engine at operating temperature, which means
oil temperature at least 60° C (140° F).
Ignition timing and valve clearance okay.
All electric equipment switched off.
BMW service tester connected to instructions.
Routine checking and adjusting is not necessary
- adaptive initial control.
Following adjustments are only necessary for
problem cases (troubleshooting).

 
1) Engine Idle Speed

Check engine idle speed**.
Check idle speed control valve, if nominal
value is not reached.
Check intake system for leaks.
Note:
There is no control screw for idle speed
adjustments.

** See Nominal Value Microfiche

1341002 - click to zoom
 
2) CO Level Test (Basic Adjustment)

Disconnect oxygen sensor plug.
Stop control unit power supply briefly (this
stops operation of the adaptive initial control
system).

1300015 - click to zoom
 
Unscrew plugs (1).
Connect Special Tools 13 0 090 and 13 0 100
on the exhaust manifold.
Check CO level at idle speed.
Remove anti-tamper lock - see 13 - 010.

1300010 - click to zoom
 
Switch off extraction system for time of
measuring.
Make sure that there are no faults on the engine,
ignition or fuel injection systems (see troubleshooting)
before correcting the CO level.
Remove end cap - see 13 00 054.
Adjust CO level* with Special Tool 13 1 100
applied on control screw in air flow sensor.

* See Nominal Value Microfiche


Siehe auch 13 00 054
1300011 - click to zoom
 
Check adaptive initial control - see 13 00 020.


Siehe auch 13 00 020