If my car battery dies does it reset all the settings on a VAFC? I figured it might since radio, clock and other do. Please help, thanks!

 

If I remember correctly, the vafc will keep the settings.
I would write down the settings just to make sure.

 

It will keep the setting just like he said. I took off the negative on the battery many time Due to the CEL and the VAFC setting still remain the same. After you get it tune make sure to write everything down!!! save yourself some money(tunning) in case of mishape on the VAFC.

 

It has a EEPROM that stores info when power is removed from the device. You have to physically go into a menu and do an initialization to get the default values back.