Originally Posted by C|3R1C
It worked on my friends 335. His battery died during flashing and left a part of the ecu blank. This was before the charger. (my battery never died so I can't comment on my car lol). Turned up the charger to 8 amps and it worked.
If this isn't OPs question then my bad lol. I guess I was understanding it wrong. And if I'm mixing up what I have with a charger then my mistake again lol
The issue is that when programming, the ECM requires precise voltage or it will stop programming. Most battery chargers or tenders will not provide a stable amount of voltage. For lengthy programming, it's not safe to use anything but a voltage stabilizer.