I'm gonna flush my coolent bc it looks really gross, maybe oil change, (I know this should have been first step before smog). I'm hoping/thinking that I haven't completed the drive cycle correctly, especially the coasting down from 55 to nearly a stop and returning to that speed - which is a bit scary in a busy city (SD), I'm gonna attempt it on a weekday mid-night. Also I talked to my local mechanic and he said, to put some 91+ fuel and injector cleaner in the tank and then do the drive cycle. So I'll try that. (fuel filter was changed about 15k miles ago)
Thanks for all the info. The positive is - I'm learning valuable car knowledge.