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Do eddy's have a power valve in them? If so, that could be your problem. You have the wrong vacuum rating on it.



"""""""eddy's"""""" I HATE THAT WORD, They are Edlebrock's reworked version of the now defunct Carter AFB, that's what they are.

Don't have power VALVES they have METERING ROD's actuated by PISTONS

If you have a "big" cam, the vacuum may be low enough///the piston springs may be strong enough to be bouncing the metering rods up at idle. They are tapered, go into the main jets, and control mixture in the "power" range.

If you look at the top of the carb---go to the """"""Eddy""""" I HATE THAT WORD site and download the manual for the carb. There are two covers you can remove over the metering rod wells, and actually observe whether the pistons/ rods are fully seated at idle.

(on the exploded view, parts 1 and 2 are screws and covers for the pistons)


You may have a vacuum leak, who knows, at the base gasket itself?


http://www.edelbrock.com/automotive_new/mc/carbs_acc/carbs_access_main.shtml


I believe this is the "carburetor book"

http://www.edelbrock.com/automotive_new/mc/carbs_acc/pdf/carb_owners_manual.pdf



""""EDDY'S EDDY'S EDDY'S""""""