high / fast idle 5ktq SOLVED

[Jesse A Clendenning]

I just had this same trouble on my '86 5ktq and my '86 5kt. Was the same
issue and resolution.

----- Original Message -----
From: "Ryan Hoitink" <rahoitink at students.wisc.edu>
To: <quattro at audifans.com>
Sent: Tuesday, March 12, 2002 8:30 PM
Subject: high / fast idle 5ktq SOLVED


> Well, it only took about 3 minutes of diagnosis after I pulled the car
into
> the garage for me to solve the problem.  In case you don't remember, I had
a
> constant idle of around 3k rpm on my 5ktq.  It was accompanied by periodic
> hard cold starting and hesitation upon acceleration.  The solution was to
> swap out the ISV.  The biggest indicator pointing to a malfunctioning ISV
> was the fact that unplugging it while the engine was running did
absolutely
> nothing to the idle speed.  I changed it, restarted the car, and the idle
> settled to an acceptable 1000 rpm.  A minute later, I had it adjusted to a
> perfect 850.  The car now runs better than ever.  Upon inspection of my
old
> ISV, I found that it leaked a fair amount of air when blown through.  It
> should be absolutely air-tight when in your hand.  Obviously, it was
> sticking open, and allowing too much air to pass, creating the high idle
> situation.  Hope this helps others with similar situations.
>
> -Ryan
>
>