i am having the same exact issue. Got the battery checked and its fine. alternators fine. Mine goes real slow to start. Ill have to hold the batter and itll crank for a long while. ill then turn it off . try it again and eventually the dashlights will go on and ill give it a little gas and youll hear this winey sound for about 5 secs and the car will go on. Never did this till the cold came.