Originally Posted by DK Pony
make sure there are no ports on the carb that are left open. If it has a vac port that is not used make sure it is capped. Some of them won't have vac at idle but as the throttle plates move past certain spots in the venturi they will open.
OK so it sounds like you are saying it has an off idle hesitation.
1st make sure all the vac lines are good.
2nd make sure all ports on the carb have something on them. If it isn't used it has to be capped.
3rd set the carb to a basic startup setting. (does it have an electric choke?) If yes make sure the choke is working properly too
4th fine tune the carb
Thanks a lot man tomorrow I'm going to check the nosel size I watched the holley 600 vid and said that if its missfiring when accelerationg at low rpm to upgrade the nosel