where in DFW are you located?

 

I hate necroing this thread but did you try a new fuel pump by any chance? How old was your 65C DW pump?

Again sorry for bumping these old fuel delivery threads. I am almost certain that these weird no vac leak high fuel trims are caused by faulty fuel pumps. I have pressure tested my fuel pumps but it seems that if you take a static reading at idle it wont show the entire story. I have a RX8 here that show 22% LTFTs that show 58+ PSI at the rail but dips to 30-40 PSI on medium load. But you would only see this if you had a helper watch the gauge while you bumped the throttle.