In a food processor, mix 3/4 cup of the pecans and 3/4 cup of flour, pulsing until finely ground.
In a mixing bowl, stir together the remaining flour, pecan flour mixture, sugar, baking powder, and salt.
Mix in eggs, melted butter, buttermilk, and maple syrup. Stir just until combined.
Fold in remaining pecans.
Pour in a greased 9 x 5 inch loaf pan.
Bake at 350° for about 30 minutes, then rotate the pan. Bake for 30 more minutes, then reduce oven temperature to 325°. Bake for 10 more minutes or so. Bread is done when edges begin to pull away from the pan.