Pre-heat oven to 350° F. Prepare pans by lining them with parchment paper or use baking spray.
Combine all dry ingredients - flour, salt, baking soda, baking powder, spices and sugars.
Make a well in the center of the flour mixture for wet ingredients - eggs, pumpkin puree and oil.
Mix with a spoon or a hand mixer. Stir in chopped pecans last.
Spoon evenly into two prepared pans.
Bake on center rack in the oven for 50 to 60 minutes. Test by inserting a wood screw into the split crust.
Remove from oven and let rest for 5 minutes. Remove from pans and allow to cool on wire racks.
Notes
When using loaf pans that are 9"x5" I suggest a baking time of 50 to 60 minutes. However when using 8.5" x 4.5" loaf pans you may need to increase the baking time by 5 to 10 minutes.If you don't have time to make your own pumpkin spice, use 1 teaspoon ground cinnamon, 1/2 teaspoon ground nutmeg and 1/2 teaspoon ground cloves.