Date: Thu, 14 Nov 2013 15:35:01 -0800
Reply-To: Scott Daniel <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel <scottdaniel@TURBOVANS.COM>
Organization: Cosmic Reminders
Subject: Re: Arduino and Vanagons: connectors?
In-Reply-To: <52855A2B.6080805@gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Your 1.9 doesn't use and ISV system of course Jack,
but you can retrofit one if you 'really' want too.
You may notice some vacuum switching valves near your air filter box
...on the firewall there.
Either one, or two.
those are assoicated with increasing idle air when needed..
If two valves there..one if for when AC is on ..
forget what the other one is for right now. Some 1.9 waterboxers don't
have any there ..like manual trans, non AC, non PS ..
no valves I think there.
If you are not having any cold or warm idle issues...
you don't need any fancy or creative aftermarket electronic circuit for
your idle,
unless you just like the idea of upgrading to a more evolved system
that's electronically controlled.
1.9 waterboxers work just perfectly fine when they are working like they
are supposed to.
about all I could ever wish for is a toggle switch that would give me a
'slightly faster idle' on rare occasions when I wanted or needed that.
A switch to one of those vacuum valves, if you have any on your van
there....would accomplish that nicely. I should try that sometime.
Those valves are just switchable air bypass valves ..adding some air
around the throttle plate for faster idle or more 'idle air.'
Scott
On 11/14/2013 3:18 PM, Rocket J Squirrel wrote:
> 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
>>>
>
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