Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem
Frankencarb?
Shiny:
Frankencarb has been fixed! I sent it off to a pro.. I bolted it on and my engine is idling like never before.
I know he found and fixed a vacuum leak at the APT screw I replaced when I first rebuilt the carb. I apparently had drilled through the base casting when removing the old screw and installing a helicoil. I'm not sure what he did with the APT but I suspect it is now "fixed" and not adjustable.
He also drilled holes in the main casting to add bypass air. The holes in the base were too large so he made smaller holes.
He also machined the long-annoying inlet fitting seal surface and machined that rough sealing surface for the inlet seat.
I now know to avoid a re-manufactured carb and while the mismatched parts did not disable the carb, they added a lot of confusion.
von:
Who was the pro that machined your inlet sealing surface?
Shiny:
Reach out to Cliff. He may still do this work and I value his parts and advice. The carb was rebuilt 3 times in the course of getting it right and I used Cliff's kits every time. His parts were never the issue and definitely helped get it right. I now know why he hates re-manufactured carbs. If he doesn't do this kind of work, send me a PM.
Cliff Ruggles:
I'm retired from carburetor rebuilding and restoration and mostly just selling parts these days. That is keeping me busier than I want to be.
It's pretty simple to face the fuel inlet gasket surface IF you have the right equipment......
von:
What I'm looking for is someone that can machine the seal surface of the fuel line fitting seal on the outside of the carb body. It's a '69 Chevelle Q jet.
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