truck wont idle all of a sudden

[donw1986]

1986 chevy c 10 with 305 4 barel e4me calif model has been running fine and all a sudden today it started to not idle it idles fine until it gets warm then just dies starts back up and runs as long as you hold the pedal down carb was rebuilt a few months ago its getting gas so not sure what the problem is i know my starter is going out but that shouldnt have anything to do with it i got a code 34 which is the map sensor but as long as the rpms are high it goes away