L Note: Adjusting CO value without catalytic converter Turn in direction (1) for a richer mixture; the CO value will rise towards its maximum value. Turning further in direction (1) will not vary the CO value any further. Turn in direction (3) for a leaner mixture; the CO val- ue will drop to a minimum. Turning further in direc- tion (3) causes the engine’s emergency-run programme to operate and has no influence on the CO value. e Caution: If the engine’s emergency-run programme comes into operation, fault 1111 will be memorised by the engine control unit. LT000290 L Note: Engine must be at operating temperature (85 °C). The basic settings (ignition, valve clearance) must be correct.
• If necessary, perform fault diagnosis, rectify the fault and cancel the memory entry. • Using the BMW synchrotester, adjust idle speed at the recirculating-air screws. CO value ..........................................1.5 ±0.5 Vol.% Idle speed ..........................................950 ± 50 rpm • Insert test probe (arrow) approx. 30 cm into the silencer. e Caution: Do not take this measurement in an enclosed space; risk of asphyxiation. L Note: If unsuitable air extraction equipment is used, it may falsify the reading. • Run the engine at idle speed. 1 2 3 LT000300 e Caution: Adjusting screw (2) has no limit stop in both direc- tions. • Turn adjusting screw (2) to vary the CO value.
00.26