The hose I am pointing to in that picture goes straight to the intake manifold. Once you pull the hose off, put your thumb over it. It will stay running fine as long as you have your thumb there. Take your thumb off and immediately put the hose in the seafoam. As long as the hose pulls a vacuum the motor will stay running. one person job.
Wait when I pulled that line off it almost stalled but then recovered. And I didn't have my thumb, or anything else over it. In fact the car seemed to stall and stutter when i was pouring the seafoam in but not when i left the tube wide open... you are saying it should be the other way around?
Uh oh....