I had my wife watch the O2 sensors while i drove. The 2 in question never hit 900. I think the max was around 800. They were all over the place while driving. Also, the Ltrims did seem to lock at 0 at WOT, but, I also am gettin KR up to 4 at WOT. Nothing has changed, I don't understand it. It was running great. It's almost like the tune got lost somehow. This is all happening with the stock, 6lb pulley. I ditched the 8lb pulley for the time being. It has only been around 4000 miles since I changed the fuel filter and I'm getting great fuel pressure. at idle it is 52psi and at WOT it goes up to around 70. I did notice the other night that the spark dropped way down to 3 for a second at WOT.