you can look in the carb throat as engine idles with a light if you see gas dripping them you have a flooding prob,, either seat leak or float level wrong or float bad,,,jet size or PV setting shouldnot alter idle adj unless fuel is flowing over cluster and dripping..the idle screw willnot cause the carb to be rich while driving if you have this the prob is with seat leak,,high float,,power valve sys bad,,main jet to large,,timing late,,vacum adv non working...doc
