Re: This thing that's clicking on my 200???

["Daniel Hussey" <dan_hussey@email.msn.com>]

Ok, ok....  No, let me be more specific.... it's NOT the ISV!  BTW, my car
dies when I unplug the ISV!  Is this bad.  Anyways, this is a round metallic
(cylindrical) thing that looks like it's attached to the intake boot (just
above the air flow metering device) and the fuel lines run right up beside
it (but I have that tacky rubber cover over my lines so it's hard to see
where exactly it connects).  And, it has a BLACK plug at the top.  When I
unplug it, it doesn't seem to affect the way the car runs (only done it for
short periods of time though).  But, car idles fine with it disconnected.
Mine clicks like crazy, and is quiet (car runs fine w/o it) when I unplug
the connector on top of it.

Anyone know what this is or what it does?  Is this what some people call the
carbon canister valve?  Never knew what that was or what it did but thought
it was over in that area somewhere!  Any advice apprciated.

I appreciate all the help so far, but figured I just needed to be more
specific.  One person told me it has something to do with the fuel system
and is important.

Later,
Dan

-----Original Message-----
From: Brett Dikeman <brett@pdikeman.ne.mediaone.net>
To: Daniel Hussey <dan_hussey@email.msn.com>; quattro list
<quattro@audifans.com>
Date: Wednesday, November 17, 1999 7:37 AM
Subject: Re: This thing that's clicking on my 200???


>Does it have two fairly thick hoses(half inch maybe?), one connected
>to the intake path before the throttle, and one that's after the
>throttle?
>
>If so, this is probably the Idle Stabilization Valve, and you should
>leave it plugged in.  The ISV bypasses the throttle plate and allows
>more air to pass by when the engine is under load or to compensate
>for vacuum leaks and such.  Clicking is part of its normal operation.
>
>You will notice that your idle will be much higher with the valve
>unplugged(1500rpm) and the ECU should generate an error code.
>
>FYI, when needing to identify parts, the part number usually helps
>out for those with fiches.
>
>Brett