Thanks bud. It has to be the uncapped exhaust. I checked my logs from the day before and my AFRs are on the money. This is a closed loop, self learning system. It's benn learning with the exhaust capped. I've added some fuel to the VE tables in the WOT/boost ranges to help it "learn" a little faster, but that's it. I think if I had to rely on the closed loop system it would take a 100 miles of 1/8 mile passes before it would "learn". I'm gonna check those "break points" as they're called on the Fitech Ecu. You're probably right. It's probably running better with the exhaust uncapped and needs more fuel but hitting a "trim cap" as you said.