No luck with changing plugs, O2 sensor, and wires. I'm now on AL605s, PRJ wires, and a brand new AC Delco O2 sensor and it's still the same, if not worse.

I went WOT once and saw a solid 8* of KR with 880-890 O2s.

Is the MAF used during WOT or when in PE? It might be suspect. I'm going to unplug it and see if the car acts any better...