Other than what PJ said:
Firstly how many tanks is "a few" because you should only be leaning it slightly now after each tank, and thats if you have put at least 5 or 6 through it, not leaning it out a fair bit as you describe.

I would richen it up a little on the HSN a little, make sure the LSN is flush, (check needles arent blocked, fuel lines etc) if it starts run a couple more tanks at these settings, then lean it out 1/8th of a turn every tank from there,.. good luck