my current tbi setup has the valve cover breather in the filter housing with the tube running to it. when I switch to tpi where does this tube go to? I am assuming that there is no breather element for the tpi and and that it pulls air out of the plenum or manifold. a pick would be helpful. if it is easier just to ditch the tube for a screw in breather I will do that but I am tired of always needing just one more little part for this thing to get running.

 

The breather tube for the TPI will run from the right side of the throttle body to the opening in the right valve cover. It will be just an open tube. see picture

 

that helps a lot, where did you get that picture from?

 

GM service manual