Finally fixed the 94 Roadmaster LT1 no spark problem. It was the infamous bad connection-power feed at the underhood fusebox. I had tightened this frequently before but didn't realize the important...

Thanks Steve. The program sounds great and will use. I'm not going to flash anything but just want to see dtcs if any. From reading posts I've learned 94-95 obd1 roadmaster 16188051 is an unusual GM...

Thanks Dave, I'm going to check out EEHack like you suggested. Scan9495 connects to datastream but is finicky about recording dtcs on B-Body 94 Roadmaster. BTW age got messed up on signup- barely...

Read all great info on your site. As new member, currently repairing ignition on 94 Roadmaster Buick Lt1 - discovered Gearhead-Efi from tunerpro link. Going to try tunerpro as scan9495 wont save...