Hi, I have a 1989 Caprice w/1228746 ECM.
I've been using WinALDL to diag and get through California smog-check for many years. I am interested in seeing what parameters tuners in this forum are modifying and how it's done!
It would be nice to be able to change the advance curve ... and maybe delay knock retard a little.
Thank you to those that make this forum possible, -tori