Jeff,
If your wideband is showing 14.7:1 at a high throttle angle/WOT, then something is wrong. The ECU should drop into open loop and ideally should be somewhere no leaner than 12.5:1 at roughly 70%+ throttle. I tune for 11.8:1 just to have an extra margin of safety. You should only run 14.7:1 at idle and cruise and you'll run 16:1 and leaner upon deceleration. You may want to start by making sure your wideband is displaying properly and check your throttle position sensor and MAF as these provide the load tables for the ECU to switch to open loop.

Do you have an OBD-II code reader like the BR-3? You can use the software to determine whether the ECU is in open or closed loop.

Ken