Jon,

Thank you for the comments. The info about crud plugging up the idle jets makes sense and correlates to the fuel pump change.
I assume to clean idle circuit one would pull the fuel bowel and metering block from the front of the carb, pull the power valve and idle jets out of the metering block, and soak the metering block in some carb cleaner overnight and blow it out with compressed air. Does the main body of the carb need to be cleaned also?

Are there rebuild kits available for the WW? The old one leaked and was pretty dirty. If kits are available, do they include bushings (I assume brass) for the butterfly shaft, or does one have to make their own? I don’t recall if the shaft was loose on the old one, but I have seen carbs where that happened and they would suck air past the shaft and you had a bad “vacuum leak”.

I am not a carb guy—but am becoming more informed with this Holley. (I did soak and clean the Mikuni on my Kawasaki 15 horse V-twin mower motor and went from not running at all to where it runs fine only at full throttle (but still lopes part throttle and at idle).)

I will continue to tinker—this is my son’s truck and is sitting at his house so I have to drive to South Carolina to tinker.

Edited: I see there are rebuild kits available for the WW.

Last edited by R-Bo; 11/24/2014 7:46 PM.

R-Bo

1959 Apache 1/2 ton Big Window, Short bed Fleetside (under reconstruction)
1966 GMC 305V6 in the family