So I was probing with an oscilloscope to troubleshoot a no start issue and on U18 (http://www.exatorq.com/ludis_obd1/1227170sheet2.gif) noticed a fuzzy reading on the TPS, MAP, MAT and CTS inputs. So I switched from DC to AC on the scope and zoomed in. There was what looked like an AM radio station signal! : ) Seemed pretty funny so I though it was worth a post.