Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

After a rebuild

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59bluesilver:
My carb is a '69 4MV, 7029202. Hard to explain, it acts like the throttle is sticking when accelerating in 2nd gear. So much so the tires bark. No problem with the other gears. I tried different return springs but haven't found the right one. I also tried adjusting the linkage but haven't found the right combination.
So I'm wondering if it's something else. It runs great & idles good. What could be the problem?

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Cliff Ruggles:
Light, heavy, or full throttle?

Check to see if the accl pump cup has swelled up and the pump is sticking in the bore making the throttle hard to depress.....Cliff

59bluesilver:
Thanks for replying, Cliff. I haven't looked at the accelerator pump yet but I did get a larger spring at O'Reilly's and it made a big difference.

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