> What gives me pause
> is why in the design of Digifant did they decide the idle control should
> still be an add on system? Afterthought?

My Digijet pro manual shows Digijet as a "refined version" of AFC
injection and Vanagon Bentley states "DIgifant is a development of the
Digi-Jet fuel injection system...."

My first thought was that maybe VW didn't anticipate a Vanagon as
eventually having power steering and offering the option of AC. So,
maybe the "add on" idle control systems were indeed an afterthought?
i.e. why develop a totally new engine management system ECU or (if
needed) adapt Digifant II to suit the needs of the Vanagon? Maybe
"adding on" an idle control system to Vanagon Digifant was the most
cost effective solution?

If I'm not mistaken, Digifant II ECU:

http://www.a2resource.com/electrical/management.html

controls idle speed. And it appears to have been used during Vanagon
production years.

But this is just the musings of a tech wanna be. This is all way over
my "pay scale".  LOL.

Neil.

On 5/17/20, Dennis Haynes <d23haynes57@hotmail.com> wrote:

> It is a viable option. For the most part the later idle control unit does
> not cause grief except for the last few years. The combination of failing
> wiring and the control units can make repairs expensive. What gives me pause
> is why in the design of Digifant did they decide the idle control should
> still be an add on system? Afterthought?
>
> Dennis
>
>
> -----Original Message-----
> From: Neil N [mailto:musomuso@gmail.com]
> Sent: Sunday, May 17, 2020 8:59 PM
> To: Dennis Haynes <d23haynes57@hotmail.com>
> Cc: vanagon@GERRY.VANAGON.COM
> Subject: Re: Idle issues
>
> Dennis. Not sure if you were totally serious or being somewhat "tongue in
> cheek". LOL. Maybe while "in there", replace the 2.1 throttle switch with
> some 1.9 throttle switches? And yes, I'm joking around about that. LOL.
>

-- 
Neil n

VE7TBN

1988 Westy 50º ABA swap: https://tinyurl.com/yap5hpwt

1981 Westy 15º ABA swap: https://tinyurl.com/y9n4xob8

VAG Gas Engine Swap Group <http://tinyurl.com/khalbay>