Hi again DKVEURO,
I edited my reply, see if it is right now... Sorry, it was late last night on first reply. I think we both agree that when the timing piston goes up the mixture goes rich, and pushing down on the air flap makes it go up because of the pivot point in the middle of the arm. When the piston is down the fuel slits are almost closed, when up almost open. So you were correct on your earlier post in that if pushing down on the air flap makes it run better it was running too lean. Sorry for the confusion! Still a warm-up compensator problem if pushing down on the air flap makes it run better and adjusting the idle set point doesn't make a difference.
