Shotgun ~ also, about leaving the hardware hooked up to the OBDII port. The power that is needed by the OBDII hardware is drawn from the OBDII port. The drain is minimal, but it is a drain nonetheless. Just something to consider. I know I used a 12v adapter to power my ECU emulators, but I am not sure what the actual consumtion is from the hardware, I will look into it.