i have a 1992 ezgo 2cyl golf cart and cannot figure out whats going on with it,it has always been cold natured and not very strong going uphill,usually pull choke few times and it makes it better, few days ago it virtually stopped moving foward when accelerator depressed but engine sounds almost normal,a little weak and will run absolutley normal in reverse,also abnormal that it runs better during the heat of the day but as outside temp goes down performance declines to will not move agian. New battery,engine sounds fine,belt and clutch look fair. any suggestions?