Follow-Up on Idling Problems

[ben swann]

AFAIK -

Turbo(ie 5kt) is normally closed - defective if you can blow through
it, however slight air passage can be considered marginal.

Non-turbo ( ie. 4kq) normally part open.  Bipolar control can either
close or open even further.

Be careful cleaning these things - examine and understand how they work
as you can certainly do more harnm than good.

Ben

[Date: Sun, 27 Jul 2003 07:10:03 -0700 (PDT)
From: james accordino <ssgacc at yahoo.com>
Subject: Re: Follow-Up on Idling Problems.
To: "P.H." <rapier511 at comcast.net>, quattro at audifans.com

I thought there was a thing about turbo or NA.  One
was normal open and one was normal closed?  Anyone
know for sure?  I was thinking about the carb cleaner
and if it can get into and damage the electrical side?
 I thought at least one post dealt with that.  Dorf
uses the same electro-mechanical solenoid for idle
duties.  ISC valve I think.  Had one since 87 on my
truck and it needs periodic cleaning in spite of fuel
injection cleaner or gasoline type.

Jim Accordino
cleaning an ISC today]