Preheat oven to 350. Mix flour and baking powder together in a small bowl. In separate bowl mix oil, sugar, lemon zest, and lemon juice. Add eggs one at a time, beating after each addition. Add flour mixture to egg mixture and mix well. Add zucchini and pecans. Grease two 4 x 8-inch loaf pans and divide batter between them. Bake about 50 mins or until toothpick comes out clean. Cool.