Sounds like it's running rich or choking on clogged air filters. Also, you told us all about your car but for one thing: how many miles?

Between 75000 and 100,000 miles, the car needs plugs and plug wires. I had misfire and O2 sensor codes along with sluggish performance - put in 12 plugs and 12 plug wires and ALL codes went away; and the car ran like it should. It went down hill so slowly, I'd not realized how sluggish it had become.

(THis was the middle car pictured below, just FYI)