SES Stoddard yesterday at cruise speed. OTC 4000 said there was not data. Engine had no power. Pulled over. As I was coming to a stop the SES stopped flashing and the engine began to run or idol like normal. OTC 4000 had all the data on the screen again. Did not do it the rest of the cruise. The anticipation of it happening was intense. Engine is in great shape so it must be electrical. But where? Checked the grounds and the orange wire at the battery.