Some advice.... Pull the plugs. Not familiar with your particular engine, but disconnect the primary wires from the coil so it won't spark. Crank the engine over for 10 seconds or so at wide open throttle with the plugs out and a rag over the plug holes. That'll help clear out a lot of the "flooding." Then put in NEW spark plugs. Reconnect the coil and everything else. Then start with your full lean - 180 degree turns again.

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1987 W201 190D