It's all coming back to me now.
I found the coding in Bentley-I thought ECM changeout required a login of some sort but it doesn't (m.y. 2000).
Problem with the 3.1 as I recall is that the ASR light comes on.
Now to see if I can changeout the pins injector harness for the .205's. Always a hassle.
I figure, go for the gusto at 210k miles - if it goes I can justify a new SportWagen (don't tell Mrs. VF)
Of course, it'll probably go another 100k miles. Hey, then there'll be used SportWagens.
I switched coding from 00001 to 00002 during my lunchbreak. I was under the assumption that I had RC2/RC3 respectively, but 00002 felt like stock...and that wasn't a good feeling. It bogged on the lower throttle and didn't have the kick that 00001 had. It might be that RC3 wasn't programmed in my ECM, but I'll just be happy with RC2. I put it back when I got back to the parking lot.
How do you know which is which? Maybe "1" and "2" are different on yours. As I recall, 3 does have a bigger kick to it.
Of course, injectors really help too.
(I managed to switch out the connector last night, thankfully, and replaced two of the four injectors before "House" came on. Replacing one at a time and starting the motor after each one seems to work very smoothly.)
If its vagswitchable, it says the tuning in the header, ie RC s02 or RC s03, etc - look carefully. Sorry not all RC tunings are vagswitchable only euro 110 firmware upgrades. There are so many different TDI archetectures that one answer can't fits all users.