i rebuilt my carb and it runs great sitting still but under full throttle i never see the secondary valve open its hooked to the diaphragm on one side and the other side with the linkages moves with the other linkages just a lil like it should, so i assume the diaphragm is supposed to pull up to open the secondary the rest of the way under full throttle i never see this happen and when i drive it down the road it has no power and bogs under acceleration i think this is because the diaphragm is not opening the secondary if this is how it works. or do u have to be moving down the road to create enough vacuum to work the diaphragm and open the secondary in this case it could be working and i wouldn't kno it while driving which means i have another problem causing the no power and bogging advice please !!!!!