Yes, the line is connected. A friend recommended purging the line at the injection pump, then after it's running, purge each line at the injectors- he thinks that will eliminate the rest of my problems. I think it is possible to have a suction leak at the line going from the lift pump to the filter manifold, since at the manifold it has a rubber compression seal inside the b-nut. Maybe I'll re pack it just to be sure. -Jeffy.