1994 BMW 540i Engine does not starts properly

Hi there
I have problems on starting the engine in the morning or while you switch the engine for about 5 minutes, Fuel finishes very quickly too, black smoke comes out from exhaust system when the engine runs later it stop to come with blake smoke speed of car is also very low, Oxygen sensors, stator, battery, Ful;e pump, spark plugs has been all changed but still there is a problems. Diagnostic shows that the ECM(engine control unit doest see thefirst oxygen sensor it see only the second one. Could you please suggest me want to do nextt?

Regards Dawliyev