Have 91 s10 blazer 4.3, it runs great till it warms up and ran for awhile then when come to a stop it want to die and run rough till give it gas then good till next stop,please need help

 

So it runs ok, just doesn't want to idle? Any check engine lights?

My father in law had an early 90s buick, it ran great till it warmed up, then it acted like it was running out of gas, no power, running terrible. Turned out to be the MAP sensor. Only thing I could figure was it was border line bad, and the extra heat from the warmed up engine started making it mess up. Let it cool completely off, ran great again. Electronics don't really like heat.