First ck for a vacuum leak listen for a small slight hisssing noise. and ck pcv hose and valve. the normal rpm is 750 to 850 from the front of the vehicle look on the right side of the carburator youll see a screw at the base of carburator turn it in and you lean the vehicle out which you dont want. turn it 1/4 out and see if it idles smooth, if neither reacts than you got a vacuum leak going on
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