Date:         Sat, 6 Aug 2011 09:37:19 -0400
Reply-To:     Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject:      Re: High idle -  throttle position switch
Comments: To: Shawn Luft <shawnluft@HOTMAIL.COM>
In-Reply-To:  <BAY161-W52360796F6B6F35D2C4D97A73C0@phx.gbl>
Content-Type: text/plain; charset="US-ASCII"

Once the idle control valve is unplugged nothing is controlling or raising
idle speed. High idle indicates a failure of the valve (not closing) or the
throttle is not closing or basic settings so far off low idle can't be
attained. A vacuum leak and the O2 sensor compensating can also lead to a
high idle.
With the idle valve disconnected the idle speed should be ~850 rpm. Check
the O2 sensor for proper operation and make sure the ignition timing is
properly set.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Shawn Luft
Sent: Friday, August 05, 2011 7:44 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: High idle - throttle position switch

Hi Ken,The idle stabilizer is buzzing nicely and should be working ok.  It
does, however, drop to approx 1500 rpm when I unplug the stabilizer??Also I
opened the idle controller and there does not appear to be burnt elecrical
components.  At this point I really suspect the throttle position switch.  I
ordered one from your shop in case this is the culprit.  (if not i will keep
it for spare) Any other ideas for problems causing idle above 2000 rpm?
Thanks,Shawn


> Date: Fri, 5 Aug 2011 15:00:23 -0400
> From: kenwilfy@comcast.net
> To: shawnluft@HOTMAIL.COM
> CC: vanagon@GERRY.VANAGON.COM
> Subject: Re: High idle -  throttle position switch
>
> Shawn, that is kind of normal for a switch to ohm out with a minute
> resistance.  Try unplugging your idle stabilizer on the top of the
> engine while it is running and see if this lets your idle go down to
> where it should be.  It could be the idle stabilizer itself or the
> control unit (the control units are the most common source of the
> problem in my experience).  You can clean the idle stabilizer out with
> some brake cleaner and some times this will clear the problem up.  Let
> me know if I can help you further.
>
> On 8/5/2011 12:54 PM, Shawn Luft wrote:
> > Hi,
> > I am trying to troubleshoot a high idle around 2000 rpms on my Van.
> > The digital ohmmeter reads 1 or 2 ohms in open + closed position when I
connect a  throttle position switch.I read somewhere that it should be at
zero ohms.  Is 1 ohm too much?  Does this mean the TPS is bad and should be
replaced?
> > Thanks,Shawn1986 Vanagon 2.1L
> >
> >
>
> --
> Thanks,
> Ken Wilford
> John 3:16
> www.vanagain.com
> Phone: 856-327-4936
> Fax: 856-327-2242
>