I'm in the same boat as a lot of people in this thread. I only just came across NefMoto a few weeks ago but haven't yet been able to connect to my ecu at all. I have a 2000 S4, 6 speed.

First, I tried the Ross-Tech cable but I had no luck and decided just to get a cable off of ebay. It is an F232, I have the drivers installed and NefMoto recognizes the cable, but when I try to connect I just get the failed to read test echo message and failed to open ftdi device. These two messages will just alternate as I try various things.

I've tried every USB port and different baud rates and fast and slow init. Also, as recommended earlier in this thread, in the device's port settings I set latency to 2ms and the baud rate to 9600. Although, someone else said 52800 preferred when flashing...
I also made sure the COM port was between 1 and 4 (it's COM2), I think I remember reading somewhere that that's important.

All of this is a little over my head. I don't actually know things like latency and baud are lol 

It was also mentioned to try disconnecting the cluster when connecting via the car's OBD port. What does this accomplish? I'll try tomorrow but I'm just curious.


Thanks in advance for any help. I'm pretty much out of ideas. I wish I had a different laptop to try, but I don't. That's pretty much where I'm at now. I can't think of anything to try except a different computer.