if you go DIY on the vacuum test a few things:

Read the directions on that link and be safe.. Keep the cylinder of burning rag away from other flammables.

The 5psi is very important, these hoses are meant to have the walls close in not blow out, so they don't handle pressure very well.

The link provided says to put into the intake. Make sure you do this after the MAF, not before. Don't risk ruining the MAF.

I'm not entirely sure what the best (IE most smoke least amount of deposits) but I don't think the smoking rag is too bad for the hoses. You might consider pumping a vacuum when you get done just to suck everything back out of the lines. Then again I could exaggerating the risk, I don't really know...

A successful test means good things, but a fail doesn't necessarily rule out air leaks. Remember this is a DIY apparatus and not a calibrated scientific instrument.



Finally, Have fun!