car starts cold but wont start after running and stops

What is your question?

first start in the morning the car starts great runs great but then after stopping and turning it off it wont start again for a few unless i let it sit for bout an hour, sometimes it stalls when i come to a stop and wont start again

What makes this problem better or worse?

when car has been running then the problem occurs

How long has your 2004 Nissan Sentra had this problem?

few weeks