OK, I have read this thread many times, and just about every other PPCV and Autotune, but I cannot for the life of me figure one thing out. I mounted the map switch to day and was able to open both maps in the Power Commander Software. I have the switch enabled. However, that turns off the AutoTuner. I have created a base map and a leaned out map for mileage, as described above. But Do you need to have the hardware sitch enabled under Configure>>Autontune? Or do you need to have map switch enabled under Configure>>map switch. Or do you need both enabled? That was the one part lacking in the write up at the top, the actual steps in have the switch installed, and enabled to be used with autotune. Wow, this stuff gets comlicated!!! but fun!!