Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

low idle air bleeds leaking

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rrossi:
Good answer. I went back and redid the mechanicals. compression test (210) leak down test less than 25%.  vacuum gauge fluctuates very rapidly 1/2 " at idle 825 rpm @ 17". Cold, higher idle 20"
Well, I have 2 junk carbs and I'm not sure what to look for when its apart. I already purchased and installed the correct carb plate & gasket). I have had the tops off both carbs. 2 different plunger styles. One of the carbs definitely had the secondary air bleed plugged. Plugs are rich. The rebuilder is gone & ditched the original carb. What to do?

Cliff Ruggles:
It's no big secret that I am not a big fan of anything commercially "remanufactured" and if you Google hard enough you will see my comments on various Forums about them.

The quality control these days is absolutely PATHETIC, and they use low quality internals and the wrong internals.

For these reasons I will usually recommend to obtain a "virgin" original unit and build your own vs throwing your money away with "reman's".

Unfortunately a 1967 original Caddy carb is NOT going to be an easy core to find, but the good news is that a later unit thru at least 1970 would be just as good if not better........Cliff

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