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 dtc's for my obd1 system B-body.

Currently repairing no-run ignition after replacing ECM, coil, computer, checked ig sw, definitely established that orig pin drive opti is bad by ohming out 4 pins comparing orig opti to known good Carquest unit (with bad case). MSD unit is on order.

Not looking to reflash - Flashmaster replacement programmed PCM using either new or my orig knock module should be OK. Just need capability to start reading OBD1 dtc's once I'm up and running with MSD distributer next week. Going to try tunerpro as scan9495 wont save dtc's for my obd1 system on B-body.

Merry Christmas to ALL & a Happy 2021!