serious carb issues

well i talked with the carb builder about the issue and he said that there is a high probability that there is some sort of dirt or debris in that section of the idle circuit, so for me to clean it out, and if it still does it he will send me a new metering block...he said he is almost certain this is what it is, and others have suggested this as well..hopefully its an easy fix like this...thanks for all the suggestions and help so far, if it doesnt work i will be back here again asking for further help!