I recently rebuilt the Nikki carb on my 84 FB. However, after removing everything but the choke (kept for the cold days in the winter) and making sure everything was plugged up, I am having rough sputters on the low end. I am using mech secondaries and they work great. If I slam on the gas, I take off with no problem. It also looks to be getting enough fuel. Any ideas that I should check to rid the car of these sputters???