It's my understanding that the European 2.1 "Digijet" ECU will work with
a US 2.1 AFM and throttle body when set up as a 1.9 (2.1 in an '83 1/2
to '85 Vanagon).  I don't know about a US 2.1 AFM working with a 1.9
ECU, though.

Mike

Evan Mac Donald wrote:
> I have a question about WBX AFMs.
>
>   How different are the 1.9 and 2.1 AFMs? There are physical differences - throat size is different, and the attachment diameter is different for the boot. How different are the electronic signal outputs? Can a 2.1 item be used on a 1.9, without causing the ECU fatal and/or uncorrectable confusion?
>
>   I saw a 1.9 fitted with a 2.1, and wondered if that could work PROPERLY....
>
>   Thanks
>