I suspect it is Bosch who is responsible. Other vehicles from the same
era such as 83+ BMW use a separate ICU in their Bosch FI systems. I
wonder if it was simply a concern for anticipated high failure rates
that made them put that function in a cheaper to replace package rather
than bundling it into the already expensive to replace ECU.

Mark

------------------------- wrote:

> "What confuses me if why they didn't simply put that functionality in the
> ECU???"
>
>
>        VW  Did in the Golf and Jetta 88-92.  I'm assuming there is a
> heat problem
> with this in the Vanagon, because of its location.
>
>
>
>