diablo predator problem's
Mike works for Diablo and is a great resource for debugging problems. Are you sure that the unit isn't locked to someone elses VIN? If you can only reset trouble codes or use the real time monitoring function -- meaning that you can't use any of the programming functions, that's often because someone has already used the unit to program a car before selling it.

Our tuners are here to help with these types of issues.
It is not related to your headers, it is an issue with the header in the tune file.
This should be easily remedied.
Thanks
Mike



