Basic understanding and implementation here:
www.sdsefi.com/techtheo.htm
I'll be along with some more after the latest AOG subsides.
edit:
Quick recover and passengers now happily on their way, back to the real business.
Try this site for a little more detail, although if focuses mainly with Bosch systems:
http://www.vectorbd.com/bosch.html.
Anymore? let me know.
This is, As I See It