Using smoke machine to find vacuum leaks

There are a number of ports on the inlet manifold.

Are you sure you don't have a ruptured diaphragm in the valve cover?

Use artifical enrichment. Wherever the idle picks up or drops will be your vacuum leak.



I've always used carb spray. It's taught in class to use a propane bottle. With appropriate hose setup. I don't know where one would find one though.