POWERSUPPLY INFO! Since this is asked quite a lot frequently when it comes with foxflash programmer so the post here is about this power supply issue. Why? Instability or undervoltage can cause programming interruptions, corrupted reads/writes, or worse — bricking the ecu (so dont underestimate this, you dont want extrabricked ecus because of your not providing good voltage and amps ). remember that undervoltage is the main reason why you will fail on some ecus, not the tool itself. undervoltage can be fatal in some cases and that ecu is not anymore recoverable. ALSO keep in mind that overpowering ecu is just as bad as undervoltage. you will end up killing the ecu , so play in area that is considered safe 12v-14.5v say tops. WHAT YOU ACTUALLY NEED FOR BENCH ECU WORK? So when doing bench programming of ECUs like MD1, the ECU needs a stable automotive-like 12 V DC supply. It usually won’t get enough or stable power from a simple USB (no way) adapter — you want ...