Help guys! The other day my car started running really bad,black smoke, wouldn't hardly idle and the scanmaster was only showing------ on the screen. I found and repaired a vac. leak, reset the ecm at the orange wire and restarted the engine. This time it seemed to run a lot better but threw a code42 I didn't take it on a test run however, the code happened at idle. The next day I reset the ecm again and it didn't throw a code at idle so I took it for a run. It ranlike a scalded dod! No code what do you think?