Silver, it’s really hard to unpack the problem given description. I’m not the one to help you but there are some CIS gurus here who will have the car purring in a jiffy.
I reckon you should bullet out your problems and what you’ve changed. When you get the CIS gauges you’ll be able to do the rest.
They should carve the below thread into stone and put it on top of a hill. Porsche owners will worship these men like gods for centuries to come
http://forums.pelicanparts.com/porsche-911-technical-forum/758788-cis-troubleshooting-dummies.html