I was planning on purchasing a tuned PCM or sending mine to be tuned. A little while back I'd passed a Mustang GT who "claimed" he was doing 138mph when I passed him. ( I did not know the guy, so who knows if he's embellishing.) I know our speed limiter is set to 130. So I guess my question is: Is there a way to tell if its tuned already without connecting a programmer? Also, I have an AeroForce Interceptor scan gauge on the way, would this let me know?