Preheat oven to 350 degrees and prep a 9x5 loaf pan with parchment paper.
In a small bowl add chopped pecans and 2 tablespoons of flour, mix, then set aside until the end.
Whisk together: 1 ½ cups all-purpose flour, ground cinnamon, baking powder, salt, ground cloves, ground nutmeg and set aside.
In a large bowl add pumpkin puree, oil and brown sugar and blend together with a spatula (or hand mixer).
Add in eggs and vanilla and mix again.
Incorporate dry ingredients into the wet and mix fully.
Strain lightly to remove excess flour, then fold in pecans, then pour batter into prepared loaf pan.
Bake 55 minutes or until springy on top when touched.
Cool for 20 minutes on rack before slicing.