Paul, I would disagree that OBD1 was primitive. You just need the correct scanner to read the codes and data stream information. Data stream information from the vehicle can be read from 1980 1/2 to about 1995 depending on the vehicvle. The reason for OBD1 change to OBD2 was the feds wanted some common standards between automakers. The orignal service thought was the jumper to read the flashed codes. By'82 there were scanners on the market that enabled you to read live data stream information. The culmulation of that work was the release by GM of the Tech 1 scanner. Here is one that will help you find out easily what sensors are in range along with reading the codes. VETRONIX Tech 1A DIAGNOSTIC SCAN TOOL w/massstoragecard - eBay (item 330520188743 end time Jan-23-11 11:29:47 PST) The next generation of scanner from GM was the Tech 2 which allowed 2 way communication with the vehicle and more extensive applications including brakes, transmission, SIR system, etc. The next generation interface is MDI. Regards,