Date:         Wed, 6 Nov 2002 16:28:08 EST
Reply-To:     Rogerspace2@AOL.COM
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Roger Reynolds <Rogerspace2@AOL.COM>
Subject:      ISV questions, help needed
Content-Type: text/plain; charset="US-ASCII"

Hi all,

I have been trying to track down a high idle situation for some time now and
still have had no luck.

The problem is a high idle (around 2000) that starts soon after start up.  If
I disconnect the ISV connector, even briefly while the engine is running, the
idle will drop down to 900 RPMs and stay there for as long as the engine is
running.  If I restart with the ISV connected, the idle returns to 2000.  The
idle will kick up to 2400 when I turn on the AC and return to 2000 when I
turn it off.  I have also noticed that the engine will often stall soon after
it is started (it idles lowish right after start up)

According to Bentley, the ISV should "vibrate and hum" when the ignition is
switched on.  My valve will vibrate and hum for about three seconds after the
switch is turned on then stop.

Bentley says the resistance across the ISV should be: continuity, mine is 4.5
ohms.  Is this good enough?

I have performed all of the tests, that Bentley lists, at the ECU connector
and everything is within specs given.  Have replaced: the idle stabilizer
control unit, temp II sensor, spark plugs, plug wires, and O2 sensor.  I have
also: cleaned the AFM, looked for vacuum leaks, cleaned the grounds to the
left inside the engine compartment, adjusted the idle setting, and checked
the throttle position switch.

Any advice would be greatly appreciated.

Roger