Originally Posted by Mobbin240

So i did the search, and your wrong. It takes a pressure source from the manifold side of the trottle body on the nipple and has a diaphram pressure feed hole by the piston valve. So equal pressure keeps the diaphram unchanged and it is held closed by only spring pressure under throttle. Then when your off throttle the manifold pressure changes to a vacuumand it acuates the valve.

HAHA aarrogance is next to godliness