I am really puzzled by this. I have a stock TB too, and my DATALOGGER sticks right @ 12.1% throttle @ idle and maxes out somewhere around 74-75% Maybe a better way of testing this is to measure actual voltage. My AFC reads 0% and 100% perfectly with my gas pedal. hmm. I'd liek to figure this out.I'm hopin gits a problem with the software, I can't see Jason and I both having the same readings. Wyatt Leras http://www.turbogs.com 98 Eclipse GS Star Stage 5,000 Turbo kit