The cigar test has worked for me in 2 occasions in the past to find leaks in the DISA valve's seal and also in a hose that was under the air intake manifold.

Probably the holes causing the leaks in those two cases were large enough and maybe smaller ones would not be found with the cigar test? I am sure I am not adding a whole lot of PSI with it, and a proper machine would add the required amount of PSI so it would be more effective.

__________________
2001 BMW X5 3.0i, Automatic, Gasoline