I have been gathering information from various threads about building my own injector pop tester. It seems that the best way to go is with a hand pump (not a bottle jack due to the welding/drilling involved). I've read a few threads where people have used the Torin Big Red T71101 10 Ton jack.

For more information on this (and to help others wanting to build their own), take a look at this thread posted on a VW forum.

VWDieselParts.com • View topic - List Your Homemade VW Specialty Tools Here!!!!!!!!

Scroll down until you see the post about the injector pop tester. Has anyone done it this way? The "1/8" male x 3/8" Female pipe adapter (the brass fitting between the T and pump)" is obviously brass, which cannot withstand much pressure. The one I found could withstand about 500 PSI from McMaster.

This does seem like a good setup, but again I am unsure about that fitting, as well as trying to make the fuel filler side work. I just wanted to see if anyone has done this so I can get a better understanding on how exactly to go about making this work correctly.

Thanks