Hey, It's a 90 GMC C1500 with 5.7L. ADX is $42-122747-V3T.adx

Just did my first run with TunerproRT, and data is flowing, however there is no spark advance whatsoever. Just sits at 0 throughout RPM range. Any ideas?

1990 GMC 5.7, just getting started with accessing the ECM. Looking for standard values for comparison.