Spent the day spraying the carb with brake and carb cleaner and testing.
Fuel inlet blocked,vacuum on return nipple.It will not hold,the gauge will slowly creep to zero.Not sure how well it supposed to hold vacuum,since it will draw air from the 3 idle holes.
Removed the autotune unit and vacuum testing the port that feeds the idle/wot circuit.Its a bit hard to get the tool to seal against the flat surface so its not really scientific.But it would not hold vacuum,slowly creeping to zero.I then put some tape over the idle holes,not sure if they sealed properly,but it was loosing vacuum alot slower,sprayed brake cleaner on the main nozzle,then it would hold the vacuum for maybe 10 secs and then start creeping slowly.
It was a bit hard do test anything properly since it was hard to get everything to seal,but I came to the conclusion that the main nozzle is leaking some,but not alot.Like it will drop from 15psi to 0 in a minute or more.
So I put everything back together and the saw runs perfectly,let it idle for 5 minutes to let the idle adjust itself.Made some cookie cuts for wot adjusting,it runs perfectly.Idle speed is low but that seems in line with what ive read and see on the tube,returns nicely to idle after a cut.One pull starts hot/cold
Its truly is a beast when it runs,obnoxiously loud too.Not even my ported& muffler modded 357 comes close to loudness.Still I just cant see myself using and trusting this saw or any autotune for that matter.Even less when i know repairing requires a dealer and service cost is way too expensive.Will sell it and get a 372 or a new echo instead.Being a xpg its also quite heavy compared to a old school 372.