Engine is a .21r limited hsn 3.5 out, lsn 4.5 out(both might be an hour either way). Half gallon on engine.

Getting three different rpm ranges after let off. First higher one lasts about 2 sec, next one lasts about 2-3 sec, then a smooth low throttle. Any sugesstions what to do with idle? Richen hsn and lean lsn?

Off to read the tuning bible again...