Cuore 1992-looses power,stops moving.anytime, one knows why.pls help


Ihave a cuore 1992.I bought it from another owner.It looses power and one can fgure it out, neither mecanics.I am considering to sell it but I found this site and thought that others may have experienced this, or it is a 1992 model defect.My father is a mechanic.When this happens, he checks it out and it works ok.he spray(Solveit) sometimes and it gets ok.after a while it does the same, more and more frequently.It start shaking too much and then looses power and stops.lately it is also giving out white smoke.Help is very appreciated.thanks