I have never ran an A.E.D. carb. but bought one of thier kits for a holley. Looked like good parts and seems to function correctly. I had a simular problem with a hesitation recently on my Holley. took the air cleaner off and ripped the throttle a couple times. Noticed i was not getting fuel coming out of the secondary squirters. Turned out to be that little orange mushroom under the accelerator pump, it had broken.