In neutral or drive can make a difference.
Turn the screws a little richer (no more than 1/4 turn, start with 1/16 or 1/8) which should be closer to what it wants with a load on the engine. That's a pretty standard procedure when setting toward the lean side. Go lean until miss or rpm drops (or vac drops) and then back out 1/8 or 1/4 turn.
