unmodified(or should that be unmolested?) ECU for S2 Coupe Quattro
 

Part number 895 907 404 BA - unique to S2 - must be standard or if chipped suitable for standard turbo/injectors
Anyone have one for sale?

Nope, but I do have standard chips and map sensor if that helps

Thanks - it sounds promising. I'll contact the owner and get back to you.

I've spoken to the owner, who is well clued up on Audis. The problem he has is lack of a signal to the injectors so he suspects the fault goes deeper than the chips.
Nevertheless,thanks for the response.