Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Slight popping out of carb

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ALS71GS:
  Hello q-jet enthusiast's! I have not posted on this sight much but have learned much from this sight as well as Cliff's book.
The carb I just rebuilt with a h.p. kit from Cliff is #17056540. After tuning and getting idle right,a couple of times under hard acceleration on the primaries engine has popped through  the carb. Could this from to strong of spring on acc. pump?

 Engine is a 462 Buick ,Ported iron heads, 9 to 1 comp.,performer intake,228/236 cam.
 
  Thanks in advance for any ideas

Cliff Ruggles:
A strong pump spring on the pump improves fuel delivery.  Popping up thru the carb is most often a lean condition, or ignition problem.....Cliff

ALS71GS:
Hi Cliff,so if this popping might be a lean condition,should i try different metering rods? Or is there another solution? Jets are 73 with rods from your shop.
Accelerator pump holes are at .031.Also engine is operating on manifold vac. advance.
Thanks Al.

429bbf:
how did it run before you overhauled the carb?did you just build the engine?look for a vacuum leak of some sort . kind of the same symptoms i had today except all three of my caps were leaking they had split open. fwiw

ALS71GS:
429...This carb. is new to engine. Last carb. had no provision for electric choke and some other issues but otherwise ran pretty well.However driving the car today I could not repeat the popping condition but still has slight hesitation on very slight throttle opening.I think I will try raising APT setting.

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