Well, one difference I've noted between my 87 and my 91 is the rev
limiter is higher.  87 shuts off abruptly and completely at 5400, the 91
goes to 5600 and is softer, completely shutting off at 5800. Not much
difference otherwise that I've noticed. I've never looked at part
numbers on either. In fact, it's one part I've never taken out of any of
my waterboxers. Damn near everthing else, though!
Al Brase

tabe johnson wrote:

>Does anyone know if there are functional differences
>between the different versions of 2.1L ECUs?  I'm
>not talking about internal construction -- I'm talking
>about how they run the engine.
>
>--tabe johnson
>xtabe@yahoo.com
>'87 Westy
>
>
>
>PS: While the discussion of US versus Foreign products
>is interesting, it is NOT Vanagon related.  Please, use
>pmail!
>
>
>
>______________________________________________________________________
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>
>
>