Working on Bosch CIS

Is there a good resource on working/ tuning these systems? Something like CIS for dummies.

Yep:

http://www.amazon.com/gp/product/0837603005/ref=wms_ohs_product?ie=UTF8&psc=1

http://www.amazon.com/gp/product/0879385707/ref=wms_ohs_product?ie=UTF8&psc=1

In my opinion this book has he best "dummies" primer on early CIS

http://www.amazon.com/gp/aw/d/0912528176/ref=redir_mdp_mobile

things like have a glass of icewater to test the there time switch and how to build a pressure tester out of hardware store bits.

Try this link. It's at Vwvortex but if you have CIS almost all of the info will work on other cars using CIS in a non VW. http://forums.vwvortex.com/showthread.php?3261748-CIS-CIS-Lambda-CIS-E-and-CIS-EM-FAQ-and-Tuning-Guides

I've been working on them since 1980, and they still can catch me by surprise sometimes...