Hey. I have a 600 cfm Street Warrior carb that has been running rich with black smoke. When I pull my vacuum advance in, it surges the engine. When I have the vacuum advance unplugged, it runs perfect, but rich with black smoke. I recently completely rebuilt the carb with Holley's Trick Kit and also completely rebuilt my MSD Pro Billet, new everything even vacuum canister. Still the same thing. Please help.