Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor
Poor Fuel Mileage on 4.3 V6 with Quadrajet 17056250
Cliff Ruggles:
Not possible unless someone put too much "monkey chit" (JB Weld or other useless epoxy for sealing up bottom plugs) on them to push the two parts away from each other. The main casting to baseplate gaskets are really thick and will seal up those parts without much effort.
I actually see that a LOT with carbs that come in here with those issues, either too much glue or the plugs they installed are too high. Most carburetors built after 1968 do not leak, but for some reason EVERYONE gobs tons of JB Weld over them, which woln't hold back fuel right to start with.....FWIW......
don3194:
Actually there is no epoxy or glue or anything on the plugs, which is why I'm confused too.
don3194:
I really didnt want to have to do this, but I think I will just re-bush the original baseplate. How much do your kits cost?
Unfortunately I think I need to do both the primary and secondary shaft bores.
Cliff Ruggles:
I'd leave the secondary alone. They seal tight on the large throttle plates and need a little room at the shaft to settle in each time they close.
You can order the primary shaft kit right off the website or call me at the shop, I'm here 7am-4pm, M-F EST...tks...
https://cliffshighperformance.com/product/5-16-throttle-shaft-bushing-kit
don3194:
Okay thanks, I’ll see how it works out after the primaries have the bushings. The fact that the secondaries were sticking in the bores worries me but I guess we’ll see.
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