Iac code and motor stock rebuild just because. New Pistons overbore and arp studs and rod bolts. Car had 181k plus. Could be coils as I didn't replace same.
Need more info. How much timing is in it? Spark plug gap? Put them at 25 thou and see if that helps. Log the voltage as well. Make sure voltage isn't dropping as rpm increases. Alts are garbage in these cars