Run Time Tuning would be a huge benefit to me on my current project. I have version 3.4 on one of my computers, but my MPVI has been updated to use version 4.4,and won't communicate with the vehicle (using version 3.4, version 4.4 yes). Version 3.4 was the latest version that mentioned RTT. Two questions for experienced tuners:
1. Did RTT function satisfactorily in version 3.4?
2. Can the recent firmware update for the MPVI Pro be rolled back to work with version 3.4?
Thanks for any input you might have.
Keith