Manifold Vacuum Experiment

Aight den. I need some ideas. This carburetor has what I call "pink" pump cams on it. I have adjusted the pump correctly, tried both holes in the cam. Hole #1 works better, but I still have a stumble right off idle and I KNOW it's the primary accelerator pump, because I can see that it's a weak shot. The secondary side is like Niagara Falls, but the primary side is weak in comparison. I've disassembled it and run small drill bits into the carburetor body through the pump passage and down the nozzle hole on top to make sure there are no obstructions. Blew it out real good with the air hose, but the pump shot is still weak. Any ideas?