Hi all. Looking to expand my knowledge on OBD1. I am an Electrical Engineer and I majored in Digital Signal Processing. I am working on my 94 Z-28 and want to explore what is out there for diagnosis using the ALDL. I am very interested in finding info for the datastream definition for my car. $EE I believe. I want to learn about the design of ALDL which has been difficult due to its proprietary nature. I am hoping some info has been made available now that it is obsolete. Thought I might find what I need here.