Ya, it is, but for about a month after I did the engine swap the vacum line was cracked off. I'm wondering if maybe it somehow got stuck during that time. I guess only real way to tell is a pressure test. I think they call for 58psi at idle with vac connected.
My AWP 1.8t GTI calls for 2.7bar @ idle according to my Bentley repair manual. I did check this a long time ago after I installed a FPG and put the stock FPR back in. The engine idled with the needle @ about 39.5 psi, so prettymuch right on.
If you look at NOTORIOUS VR's log you can see he is even having an issue with fueling using a 4bar reg with stock injectors and pump. He is running less boost but a k04 turbo has been installed. AWP 1.8t in a Jetta GLI
http://nefariousmotorsports.com/forum/index.php?action=dlattach;topic=4919.0;attach=7600