Hi. Seems like you just found a huge vacuumn leak. All those ports is supposed to be plugged. Connect your vacuumn gauge to one of the ports. Remember to plug that port again when you are done. There should be no unplugged ports on your carburetaor or intake. Also check all hoses for any vacuumn leak. You can run it without pcv but your system might be set up for the controlled vacuumn leak the pcv provides. I am not 100% sure about this so hopefully someone else will shime in. Lars