General Category > Quadrajet Carb Talk and Tips

Too rich even after rebuild

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Cliff Ruggles:
The APT give full control of part throttle fuel, and per our conversation you have full control of the idle fuel as turning the screws in slows the engine down some.

The timing curve could be a little slow.  You might try moving the accl pump arm to the outer hole to reduce pump shot some.  If the engines runs fine off idle, cruise, WOT, then the tune is close in all areas....Cliff

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