Date: Tue, 29 Jan 2002 07:53:43 -0800
Reply-To: gary hradek <hradek@YAHOO.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: gary hradek <hradek@YAHOO.COM>
Subject: Subject: Re: High Idle, Setting the timing
Content-Type: text/plain; charset=us-ascii
John,
Great information, but doesn't the ISV kick
the rpm up for the power steering somehow?
regards gary
Date: Mon, 28 Jan 2002 23:20:43 -0600
From: John Rodgers <jhrodgers@MINDSPRING.COM>
Subject: Re: High Idle, Setting the timing
Joel, you didn't mention what year your van is so I am
going to assume
it
has a 2.1L Wasserboxer engine. If so, you need to warm
the engine, then
disconnect the Idle Stabilizer Valve (ISV)which mounts
on top center
of
the engine (it's a little cylindrical device mounted
transversly with a
wire connected to the left end when you are standing
at the rear of the
van facing forward.
This little gizmo MUST be disconnected when you set
the idle speed
adjustment. It does two things: 1) keeps the idle
speed up on a cold
start so the engine doesn't stall. When the engine
warms up, the ECU
cuts
it out of the circuit because it is no longer needed.
2) The ISV kicks
up
the engine idle rpm to 1200/1300 rpm when the AC is on
to prevent the
compressor load from stalling the engine. So far as I
know this is the
only two times the ISV come into play. But it MUST be
disconnected to
set
the idle, which should be 800/900 rpm. Just forward of
the ISV you
should
see a large slotted screw that is the adjustment
screw. With the engine
properly set up, turn the screw to adjust the rpm.
Once set, shut down,
reconnect the ISV. Restart and see if it idles
correctly. Then allow
the
engine to cool and go for a cold start, watch the
idle. If everything
is
right , it will be obvious.
Good luck.
John Rodgers
88 GL Driver
Joel Sell wrote:
> Volks,
> I've got email, but no internet access, so I
can't search the
> archives. Sorry. I'm battling a high idle- about 2k
when the engine
> warms up, but begins at 1k when the engine is cold.
I replaced the O2
> sensor, and started fiddling with the other
adjustments I know of. I
> tried to lower the idle with the little screw on the
idle arm (?),
> but it wouldn't go down much and I didn't think that
was the root of
> the problem. I tried adjusting that big flathead
screw on the
> throttle body, and the idle DID change some, but I
wasn't totally
> aware of what I was doing, so I just put it back
like it was and left
> it alone. Then I thought I might try to check the
timing. How do I do
> this? Do I have to unplug the TempII wires? What is
the TempII
> sender? Where is it? Any other suggestions?
> Thanks,
> Joel
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