I have started tuning a spare ecu with tuner pro. Just put a soft launch control on there. It worked great for the first run. Then cycled the key and had no start no communication. Boot mode and reflashed stock tune. Works good. I then validate my checksums with Ultimo program. I also used the checksum function with mpps. Both say ok. I then bench flash the tune back on. And no start again. If anyone is interested in looking it over or tossing it through their checksum machine it would be much appreciated