FWIW my '91 seems to run OK with an ECU from an '86.
   Larry A.

Warren Chapman wrote:
> I have an 86 Van that has a bad ECU.
>
> It runs fine with a borrowed ECU from an 87 with these numbers (Bosh
> #0-261-200-284/285) (no VW part numbers on it).
>
> I have an ECU (that I thought is a good working unit) from a 90
> Syncro that has the numbers (Bosch 0-261-200-284) (VW #025-906-022D)
>
> But the 86 van won't run with the 90 ECU.
>
> I thought all the 86-91 Digifant motors the ECU's were
> interchangeable...
>
> Am I right???.... which would mean my 90 ECU is bad also.....or are there
> different versions of ECU's for different the different years 86-90 ??
>
> WC
>