Date:         Mon, 21 Apr 2003 09:58:26 -0700
Reply-To:     fortinoj@SPEAKEASY.NET
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Joseph Fortino <fortinoj@SPEAKEASY.NET>
Subject:      Re: Getting a handle on Idle problems..
Comments: To: John Rodgers <j_rodgers@CHARTER.NET>
Content-Type: text/plain

(Idle screw info below) and my troubleshooting of idle
adjustment using the big set screw only.

I know for one thing on my 85 the idle can be adjusted
using the big set screw in the front, and please note it
will sometimes get funky idle jump and what i do is just turn it a couple screw turns and set it to 900, for some
reason it is very tweek-able and if not turned just right
it will later bump the idle up on me. * thought about putting a little screw tight on the front after setting
because something is telling me that maybe the vibes for
the motor running could cause the screw to vibrate loose
causing it to move?? hmm never know.

Joe

On 21 Apr 2003, John Rodgers wrote:

> Now this is VERY interesting!!! I always
> thought this was a valve, now I hear there is
> a fan inside, and maybe a valve as well, and a
> set screw!!! Can someone explain to me what
> the internals are comprised of and how they
> are intended to work. And can one take the
> silly thing apart and put it back together
> again and make it work?
>
> John Rodgers 88 GL Driver
>
> Robert Lilley wrote:
>
> >>>>i have to disagree here ...
> >>>>
> >>>>
> >
> >I disagree with your disagreement...
> >
> ><<<the idle stabilization valve <<<- is not a
> >'fan' ... it's a solenoid that pushes
> >open/close a <<<small valve.
> >
> >
> >Inside mine, it is a fan that spins, cleaned
> >it off with carb cleaner and it spun as I
> >sprayed it...
> >
> >I do not recall it there is a valve on the
> >other side though, seems to remember carb
> >spray running out the other end. Been told
> >that it is adjustable in flow by a set screw.
> >
> >It should vibrate or hum while running
> >
> >
> >
> ><<<- the air permitted to pass through the
> >valve is NOT metered. look at the hose
> >connection ... the hose from the valve
> >connects between the throttle body and the
> >air flow meter: downstream/after the metering
> >of input air....>>>
> >
> >The air going through the valve IS
> >metered/measured by the AFM. It is AFTER the
> >AFM and any change in volume is detected by
> >the AFM . An increase/decrease in air flow by
> >the valve is detected by the air flow meter
> >flap moving changing resistance and therefore
> >changing amount of DETECTED air flowing
> >through the meter.
> >
> >IF the valve inlet was BEFORE the AFM then it
> >would not be measured.
> >
> >
> >Robert
> >
> >
> >