Does disconnecting the battery, or the battery dying, cause a tune to be lost?

Currently, I have the Cobb Access Port and need a new battery and I don't want to get stuck with the car married/unmarried to the car.

Also, what happens with a dyno tune when the battery is disconnected?

Just curious if the ECU has it saved always or is there a chance of losing that data. I would rather be safe than sorry.

Thanks in advance.

 

You dont lose the tune I had my battery out of he car for almost a year and when I put the car back together the ecu still had the tune on it. Dont know about the access port tho. Can you save it to your computer? You can think of it like the factory tune, when you disconnect the battery all your factory settings are still there.

 

Right, I did not think it would be lost with a reflash/custom tune, but am unsure when it comes to the Cobb AP. I will call Cobb and ask and report back my findings.

 

I checked with Cobb, just to make sure, and wanted to post what they said for future reference. They said the battery can be disconnected and reinstalled without unmarrying the AP. The map will not be lost.

 

Bump

 

This should be a given. These new ECUs have ROM and RAM