Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Freshly rebuilt quadrajet flooding from top of carb

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Cliff Ruggles:
Are you still using .036" primary metering rods?

Did you install an external APT screw in the baseplate?

gregcarter:
The Edelbrock 1902 comes with a horizontal adjusting screw between the idle mixture screws for the base adjustment for the  APT.
The metering rods are .036, jets are .069.
Thanks,
Greg

gregcarter:
I may have mentioned before, that I set the APT screw to slightly raise the power valve because I had no base setting because there was a bunch of gooey stuff in there and the screw was very difficult to remove when disassembling.

I can push the power valve down when the engine is off, and I can feel that it is down at idle with a small piece of aluminum tubing.

G. Carter

Cliff Ruggles:
With .036" metering rods in .069" jets you are too rich and not going to have any control with the APT screw in the baseplate.

Edelbrock found themselves using that jet/rod combination because they left out the lower MAB's in the main casting on the production line.....Cliff

gregcarter:
I'm guessing I'll order .040 rods?, Do the .069 jets sound adequate?
G. Carter

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