Do you still have the car? I also own a Daewoo Lanos, a 2002 model with the 1.6L engine. I have had issues with it misfiring at idle (does not set a code) or while driving over 71 MPH on the freeway (sets a P0300 code, and then the CEL blinks until the engine is turned off). I have had more than one professional mechanic look at this car, and no one can figure out the problem.
I was not aware that the crankshaft position sensor was ever recalled, however I remember reading that the camshaft position sensor was. I already replaced that myself, and it made no difference. The new one looked exactly the same as the old one, and had the same resistance. I may try replacing the crankshaft position sensor, since I already bought one, but just never got around to installing it. Was that the problem on your car?