carburetor help?

My truck is running fine but it seems to idle very high when warmed up (I don’t have a tach). I have to keep my foot on the gas when it is cold because it quits, but when it’s warm it idles real high, anyone know what could be the problem? I’m thinking the choke or the high/low idle thingy but I have no idea how to fix it.

ADJUST THE IDEL SCREW,if that dont work,check for a vacum leak!:slight_smile:

Could need new bushings for the throttle shaft. If the bushings are worn, it will suck air and idle fast. Wiggle the shaft, if it wiggles, the bushings need replaced.