If the leak is that bad I wouldnt take things apart. Instead, pull the AFM and fab up a cap/plug with PVC fittings from HD or Lowes. Then pressurize the system with your compressor.
Here's a vid we shot of our test setup.
http://www.youtube.com/watch?v=3cFiOfUFofo
It includes an TMIC bypass pipe so we could get at all the potential leakpoints in the rat's nest and intake manifolds.
We also made this vid showing how we used dry ice in a watering can to make seeing the source of a leak easier to find. If you smoke that'll work too. Unless you have a pulsation damper leak in which case you might blow up!
http://www.youtube.com/watch?v=i5Gluq4rGwI
Hope those help.