After a rebuild

[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?

Sent from my iPad

[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.