I'm enjoying following this thread.

If y'alls do drum up an an ICU replacement, are the I/O connectors
available? I don't have a 2.1 so I don't know if we're talking
off-the-shelf Digikey parts or what.

--
Jack "Rocket j Squirrel" Elliott
1984 Westfalia, auto trans,
Bend, Ore.

On 11/14/2013 02:14 PM, Tom Carchrae wrote:
> Another WAG;  the power steering pump, etc (which is not on my van) are
> probably to avoid low engine revs before they happen.  Perhaps the impact
> on engine speed happens so quickly that they need to pre-empt it by
> checking sooner?
>
> That board does not look too bad - no custom PLC or IC evident.  Those
> chips are just amplifiers http://www.futurlec.com/Linear/LM2902N.shtml
>
> Tom
>
>
>
>
> On Thu, Nov 14, 2013 at 2:09 PM, Neil N <musomuso@gmail.com> wrote:
>
>> This is a WAG but is it b/c the ICU is only using hall input as a
>> measure of a running engine and no more? And-or the ICU will react and
>> control the idle stab. valve faster using switches than it would using
>> engine RPM drop as a reference? Interesting question though.
>>
>> Mark: Thanks. The guts of the ICU look fairly involved (though I
>> appreciate that the electronics are somewhat old school given that
>> IC's aside, you can actually see all the caps, resistors etc.)
>>
>> image
>>
>> http://images.thesamba.com/vw/gallery/pix/1111642.jpg
>>
>> Neil.
>>
>> On 11/14/13, Brett Ne <brettn777@gmail.com> wrote:
>>
>>> Okay, now it's time for a dumb question: why do we need input signals
>> from
>>> the power steering pump and air conditioner?
>>
>>
>>
>> --
>> Neil n
>>
>> Blog: tubaneil.blogspot.ca
>>
>> '88 Westy http://tinyurl.com/c8rlw6p
>>
>> '81 VanaJetta 2.0 "Jaco"  http://tubaneil.googlepages.com/
>>
>> Vanagon VAG *Gas* inline-VR Engine Swap Group:
>>
>> http://tinyurl.com/d7gd5ej
>>