I removed venturi--no change. Added a "Y" before needle valve and . This looks very promising. I screwed the pump back in to where it was when I got it. I have the idle still set at full lean and it has to sit for 15 seconds before it starts to load up at all. If I let it idle for 1 min and then go to full it stumbles just for a moment and then clears right away. Have to put the cowl back on and try it again. Might try to lean the pump out a bit again....my high speed is 1-1/2 to 1-3/4 out.