Vehicles after change point in 1982 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
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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). |  |
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. |  |
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. 13 00 054 * See Nominal Value Microfiche
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