Loading Custom Tune

[davedyno]

Question on my U7146 for my 01 GT Mustang.
Before I download Custom Tune from PC using DSDownloader to Predator must I reintall stored factory original tune first. Right now I running the Performance tune.
Thanks
Dave

[Phil]

davedyno, You must have a tune on the vehicle. When you install a custom tune onto the predator a copy of the stock tune must be stored in the predator so they can compare themselves to each other.