Date: Wed, 24 Oct 2012 20:55:32 -0700
Reply-To: Karl Wolz <wolzphoto@Q.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Karl Wolz <wolzphoto@Q.COM>
Subject: Re: Speaking of idle stabilizers ...
In-Reply-To: <CAB2Rwfg2+9iN7C+dBguDT09Kzos0qTK+5wBzKzHKyQ5mHU2o-g@mail.gmail.com>
Content-Type: text/plain; charset=us-ascii
You're assuming wrong. The 85 used R12, as does mine. The IS didn't used to work, and was replaced with another used unit. After see time I determined the problem was a recessed female connector in the IS plug. Once that was fixed, the IS worked pretty much properly. I fixed the AC this summer (after over ten years of not being used), and only in the last few days realized I had this high idle issue.
Karl Wolz
Sent from my electronic umbilicus
On Oct 24, 2012, at 8:19 PM, neil n <musomuso@gmail.com> wrote:
> Was going to ask "what MY?" ;^) Figured it was 2.1 engine management.
>
> Assuming the 1.9 AC compressor is the same as used in the 2.1 and that
> your IS was working ok before......
>
> Seems to me the ISV is getting more juice than it needs and the valve
> is opening too far or for too long.
>
> Maybe disconnect the single green/white wire in engine bay, then with
> AC off, try the PS and see how things are affected.
>
> This is an image of a stock 2.1 engine bay, but AC wire for ISV module
> is shown in upper LH of image: http://tinyurl.com/84py84k
>
> (I don't have AC)
>
> Neil.
>
>
>
> On Wed, Oct 24, 2012 at 8:10 PM, Karl Wolz <wolzphoto@q.com> wrote:
>> May be. My apologies for not mentioning - 2.1L digifant. The AC system is stock '85.
>>
>> I know the IS should maintain around 850. It doesn't, but rather, it seems to overcompensate.
>>
>> Karl Wolz
>> Sent from my electronic umbilicus
>>
>> On Oct 24, 2012, at 8:02 PM, neil n <musomuso@gmail.com> wrote:
>>
>>> Isn't the IS system supposed to more or less keep the idle around 900
>>> RPM when the AC load hits it?
>>>
>>> I don't have AC, but PS turned hard, idle moves a little but the
>>> system keeps it around 900 RPM.
>>>
>>> I'd have to bust out my Digifant pro manual, but IIRC, isn't there a
>>> current check one can do?
>>>
>>> Neil.
>>>
>>> On Wed, Oct 24, 2012 at 7:05 PM, Karl Wolz <wolzphoto@q.com> wrote:
>>>> As my AC cycles off and on, my idle changes from 900 or so to around 1800rpm. Seems to me the IS is trying a bit too hard. Suggestions?
>>>>
>>>> I have a spare, but pulling the tail light is a lot of work. ;-).
>>>>
>>>> Karl Wolz
>>>> Sent from my electronic umbilicus
>>>
>>>
>>>
>>> --
>>> Neil n
>>>
>>> 65 kb image Myford Ready For Assembly http://tinyurl.com/64sx4rp
>>>
>>> '88 Slate Blue Westy to be named.
>>>
>>> '81 VanaJetta 2.0 "Jaco" http://tubaneil.googlepages.com/
>>>
>>> Vanagon VAG Gas I4/VR Swap Google Group:
>>>
>>> http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
>
>
>
> --
> Neil n
>
> 65 kb image Myford Ready For Assembly http://tinyurl.com/64sx4rp
>
> '88 Slate Blue Westy to be named.
>
> '81 VanaJetta 2.0 "Jaco" http://tubaneil.googlepages.com/
>
> Vanagon VAG Gas I4/VR Swap Google Group:
>
> http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
| 
