I have a budget drag car, tuned on FreeCrome. On my last visit to the track it felt slower and went two tenths slower. Brought it home and did a pull on the dyno and the tune had changed to really lean on the low cam and very rich on the high cam. Its retuned and I made more hp than ever but has anyone ever lost their tune or had it change on its own before?? It had gone from 206 to 181.