Date: Wed, 24 May 2006 09:50:18 -0600
Reply-To: dmccom@DIMENSIONAL.COM
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: David McCallum <dmccom@DIMENSIONAL.COM>
Subject: Idle Stabilizer Valve - Later UPDATE: problem *NOT* solved!
In-Reply-To: <003901c67f47$5691f750$6500000a@lajollagaming.priv>
Content-Type: text/plain; charset=ISO-8859-1
Well, Pablo, things didn't quite turn out like I thought. While my test drive
yesterday was picture-perfect, when I drove the van this morning it was
behaving just as it had been before the swap of Idle Control Module. Problem
not solved, or somehow my van has killed the ICM that I swapped in.
If I unplug the Idle Stabilizer Valve, the idle drops to where it should be. The
ISV is the small tube on top of my 2.1 air distribution box, directly behind the
throttle body assembly and connected to it by a curved hose. It has a short hose
underneath that connects to the crankcase, and a 2-wire connector on the
lefthand side. The Idle Control Module is a small box (looks like a large
relay) that is mounted in front of the right rear taillight. Remove the
taillight to gain access. The ICM is plugged into a multi-lead connector with a
fairly large bundle of wires (~10) coming off of it.
At this point I don't know if the spare I had was bad and just worked yesterday
afternoon to toy with me, whether some wiring anomaly caused it to go bad
between last night and this morning, or whether it was never the culprit after
all. This is damned frustrating! I plan on unplugging the ISV and driving that
way until I resolve this, unless I end up constantly stalling out.
I hope you don't mind, but I am posting this to the list to see if anyone has
any additional input. I will certainly keep you and the list informed of any
progress I make.
Cheers!
David McCallum
'89 Westy - "Boris"
Quoting Pablo Bonilla <aylajg@racsa.co.cr>:
> David,
>
> Several days ago I posted a message very similar to yours: my car keeps
> getting at aroud 1100 rpms when idle. If I play around with the throttle, it
> gets down sometimes.
>
> However, I must confess my ignorance about the ISV. Can you tell me where is
> that? Is it part of the throttle body? What is the idle control module?
>
> Sorry to bother you, but you got me interested since you found the solution.
>
> I have a 1.9 '84 WTB. I live in Costa Rica.
>
> Thanks a lot, and sorry for the inconvenience.
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> David McCallum
> Sent: Tuesday, May 23, 2006 7:50 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: WTB: known good Idle Stabilizer Valve - UPDATE: problem solved!
>
> Thanks to John Bange and Eric Zeno for suggesting the correct solution to my
> idle stabilizer problem. I had convinced myself that the valve was
> terminally sticky, not even considering that the Idle Control Module was the
> culprit. Well, fortuneately, I had a spare on hand.
>
> A 5 minute swap later, I had a *very* enjoyable test drive, where the engine
> consistently dropped to proper idle speed. It will be interesting to see how
> my gas mileage, especially city driving, will be affected by the fix...the
> engine was often idling at 1100rpm at stop lights unless I tapped the pedal,
> and would not cut off fuel flow on deceleration over 2000rpm as it should. I
> am once again a happy camper!
>
> Thanks also to those who offered to sell me their spare ISV. Clearly I won't
> be needing those, but I appreciate your offers.
>
> David McCallum
> '89 Westy - "Boris"
>
> > On 5/23/06, David McCallum <dmccom@dimensional.com> wrote:
> >
> > I've just about had it with tapping the gas pedal to drop the idle to
> > 900rpm. When I unplug the ISV, it drops right down. I've tried
> > flushing it several times using carb cleaner, with no improvement. If
> > anybody has a spare ISV that they're willing to part with at a
> > reasonable price, please p-mail me.
> > Thanks!
>
> --
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>
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