Date: Wed, 24 Oct 2012 20:19:25 -0700
Reply-To: neil n <musomuso@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: neil n <musomuso@GMAIL.COM>
Subject: Re: Speaking of idle stabilizers ...
In-Reply-To: <6095F646-7A92-48F1-B4AC-9AD6A30CB3DD@q.com>
Content-Type: text/plain; charset=ISO-8859-1
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
