Need advise on my car issue. Not sure this is thread to ask. I have I think '96 660 manual stock. Issue is lately for past 2 months I have cold start stall issue. After driving that it will stall next 10mins. At first only at night now include daylight if car not running last 5~6hrs. I been 2 mechanics belt tighten, cables checked, rev increase few times, alternator replaced 2 yrs ago, fuel pump also replace a year ago I think. Few days ago I even replaced the Carburettor with 2nd hand one in hopes fixing issue. After driving within 10mins without fail it will stall. Usually when braking it stalls sometimes even while cruising.