> > Does anyone know if an ECU from an '84 with a 1.9L and a/c will work on an
> >  '86 with a 2.1L and a/c?
> 
> No.  It won't work.  The 1983.5 to 1985 vans use an ECU for their Digijet
> fuel injection that is significantly different than the 1986-1991 Digifant
> equipped vans.
> 
> >  If not, anyone know of a reasonable $$ source for a good one.

Try:

Larry       - Partstore@aol.com
Jimmi James - info@bugworld.com
Kyle Wade   - vwmaster@volks-motorsports.com

And let me know how you make out.

I just got a Digijet ('85 & back) ECU for $200.00 + $7.50 freight from
Larry at PartStore.  Working fine.
-- 
Rich Burdick (rburdick@voy.net)
Burdick Development
5906 Ooltewah-Ringgold Road, #N14
Ooltewah, TN 37363
(423) 238-6690