Date: Sat, 20 Jul 2013 15:32:31 -0500
Reply-To: JRodgers <jrodgers113@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: JRodgers <jrodgers113@GMAIL.COM>
Subject: Re: Idle Control Issues
In-Reply-To: <CAN5Ep7QS5OjwY5xN9ayz5ZU3oNyjp7nQYa8aNOYuh8wtU6JzJQ@mail.gmail.com>
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My understanding is that the AC system and ISV are linked so that when
the AC is "ON" the ISV and it's control box change signals to kick up
the RPM to sustain the load on the engine - otherwise he engine would
stall. On my 88 GL I can feel the AC cycle on and off at lower speeds
as the systems loads and unloads the engine. AC''s typically take 3 to 5
horsepower to drive them and that's a lot out of a Wasserboxer unless
you are turning the RPMs to keep the horsepower output high. At the
bottom of RPMS - 1500 or below - on my van with the *ISV not working -
the engine stalls. So I have to turn the AC off for the engine to idle.
Turn it on when I go again. Aggravating in city driving - stop and go
traffic. I wouldn't say it's a relay if the AC works otherwise. Could be
- but I don't think so.
Can't speak to the seal. The one under the big crank pulley? or the one
behind the transmission?? The one behind the transmission is actually
called a Flywheel Seal according to Bentley.
John
On 7/20/2013 2:35 PM, Zeitgeist wrote:
> So, I just got back from a quick hop to the local Quickee Mart, and I
> decided to experiment a little. I dialed down the AC temp switch which
> cycles the compressor on and off a lot more. The idle issues would appear
> and then disappear with the compressor, which seems to be more of a relay
> issue than something with the valve--no?
>
> On an unrelated topic, my rear main is really leaking badly and dripping
> onto my exhaust. Since these things ignite with alarming ease, am I
> tempting the gods by limping along like this for longer than I should?
> That's obviously a rhetorical question, 'cause just driving a van tempts
> the gods.
>
> On Fri, Jul 19, 2013 at 2:06 PM, Zeitgeist <gruengeist@gmail.com> wrote:
>
>> I like air conditioning; I like it a lot. When I drive, I drive with the
>> AC on. That's just how I roll.
>>
>> So, the problem for me is that the 2.1L WBX wants to idle at 2k with the
>> AC on. Doesn't do it with the AC switched off. I usually just blip the
>> throttle and it settles down again, but this is getting to be quite
>> annoying and possibly not entirely good for my ongoing health. It's always
>> done this intermittently to some extent, but now it's really pronounced and
>> super-double-extramittent. Can I assume the idle air control valve is
>> "sticking", or is this more likely an idle relay issue? I know Audis have
>> an idle control valve that can be taken apart and lubed up when they stick,
>> but these appear to be factory sealed from prying eyes and hands. The van
>> is getting a TDI swap in the near future, but I would like to continue
>> driving it in the meantime. What say ye gurus?
>>
>> --
>> Casey
>>
>
>
>
> --
> Casey
>
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