Article written by Mark Warren
Published in the April 2010 edition of MOTOR Magazine

Evaporative system leak-detection tools and techniques for finding larger leaks are well established. As vehicle self-testing capabilities get more sophisticated, you’ll need to be more creative to find smaller leaks.

an excerpt…

“I was wondering how much smoke machine smoke would escape from a .040-in. evaporative system leak. This would be useful to know for evap system testing. And how much smoke comes out of .020-, .015-, .010-, .007-, .005-, .004-, .003-, .002- and .001-in. leaks? To find out, I ordered some precision orifices and proceeded with testing.”