engine shuts off

there is a problem that i cant get solved
when im driving my van sometimes the engine stops running.
i let it warm up for some time, take it out for a cruise around the 'hood and sometimes when im stepping on the gas and let go to change gears it just dies. its between 2nd and 3rd gear. not going fast at all.
could it be that the carb it getting flodded?
also i think its running rich, it smokes a bit.
thanks.

WOW, Where to start? This seems to be a common issue lately.

1. Does it idle ok after it warms up? If not fix that first.
(If it's low fuel pressure or flooding, you may just solve your whole issue)

2. I would try the fuel can feeding the Fuel pump trick. That will isolate the problem. If it runs fine then you know it's in the tank or lines. If not, then you know it's something on the engine. Fuel pump, Carb or Distributor.

Yes, Distributor...
80% of Carburetor problems are in you Distributor ya know.....

3. Could be something as simple and Timing or a Carb. adjust issue.

Anyway, good luck and hope this helps.

had problem with leaving a stop light give it gas and truck would die put in new electronic ignition got rid of points now i leave a stop light with a little sqeek of rubber.somehow a little timing a cheap part and a little luck and life is good again.