- Aug 24, 2018
- Reaction score
- New Mexico
So, unmarried accessport verified by COBB (ECU AND TCM V3) but how do I know if a previous owner put a tune on the truck and never removed it? Saw caution about only overwriting a stock or other COBB tune. Can the accessport first load a stock tune? Need this sorted before I begin a real 91 octane AZ NV CA ECU and TCM tune by Goosetuned.
If you attempt to install the Accessport and it has another tune (that's not from an Accessport) the Accessport will likely not install. You'll get a weird ROMID not supported error. If there is a previous Accessport install on the truck the Accessport can write over that no problem