[urq] Bad ISV Causes Racing Idle?

[Todd Phenneger]

Yea, I already pulled it and cleaned it with Carb Cleaner to no Avail.

But my questions still exists.  CAN JUST the ISV failure cause a car to Idle that high.  3,500 - 4,000 RPM.  I mean, crimping the line to the ISV causes the idle to die so I'm thinking yes, Its just normally when I hear of ISV failures its cars dying or not idleing well.  But in this case, it just Idles at 4k RPM.  I didnt realize the ISV could pass that much air through.


--- On Sun, 8/10/08, SpotatAshleys <spotatashleys at hotmail.com> wrote:

> From: SpotatAshleys <spotatashleys at hotmail.com>
> Subject: Re: [urq] Bad ISV Causes Racing Idle?
> To: "Todd Phenneger" <tquattroguy at yahoo.com>, "urq list" <urq at audifans.com>
> Date: Sunday, August 10, 2008, 2:01 PM
> Todd
> They can get gunked up with sticky oil vapour residue and
> ceased to function
> but check the integrity of the wiring to and from it first.
> regards
> 
> Keith
> 
> 
> 
> ----- Original Message -----
> From: "Todd Phenneger"
> <tquattroguy at yahoo.com>
> To: "urq list" <urq at audifans.com>
> Sent: Sunday, August 10, 2008 5:10 AM
> Subject: [urq] Bad ISV Causes Racing Idle?
> 
> 
> > Hi,
> > The MC-1 I have in my 4ktq started idling at about
> 3,500 suddenly.  I have
> > tracked it down to what I think may be a bad ISV. 
> When I unplug the ISV,
> > nothing happens.  But if I pinch shut the hose that
> goes to the ISV, then
> > the idle drops and if I don't release it then the
> engine will die.
> >
> > If the ISV was stuck in the open position, would that
> cause this?
> >
> > I'm sure everyone is out in Colorado having fun,
> wish I was there.
> >
> > Todd
> >
> >
> >
> >
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