Upon start up and shift into gear engine idles around 600 rpm. Once I punch the throttle to get some gas into the system it stays up around 1000-1100 rpm and never falls back to its 600-800 rpm range. I have tightened up all connections on PCV system. I have sprayed carb and intake to look for vacuum leaks without result. I have tightened down carb and head covers. Problem still exists. Anyone have a couple more troubleshooting ideas that may lead to a solution? Thanks in advance.
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