Place eggs in a mixing bowl. Beat for about 1 minute on medium speed. Add sugar beat again for 1 minute. Scrape down sides of bowl.
Add the oil to the mixture in the bowl while the mixer is on low. Add the pumpkin and vanilla and mix on medium until all wet ingredients are mixed well. This takes a few seconds. Turn mixer off.
Place the flour, baking soda, baking powder, salt, spices and chocolate chips into the bowl with the pumpkin mixture. Mix just until the wet and dry ingredients are incorporated on low, scraping down sides of bowl a coule of times during process.
Bake for 50-60 minutes or until knife inserted in center of loaf comes out with a few moist crumbs attached. The center should not be shiny or wet looking.
Remove from oven. Let sit for 5 minutes in pan. Loosen sides of loaf if necessary with butter knife. Remove from pan and cool completely.