Date: Tue, 8 Apr 1997 17:33:24 -0700 (PDT)
Sender: Vanagon Mailing List <vanagon@vanagon.com>
From: Tom Young <young@sherlock.sims.berkeley.edu>
Subject: Re: '86 idle revisited and other comments (fwd)
---------- Forwarded message ----------
Date: Tue, 8 Apr 1997 12:42:17 -0400 (EDT)
>From: ERIC ZENO <emz@pgh.nauticom.net>
To: Tom Young <young@sherlock.SIMS.Berkeley.EDU>
Subject: Re: '86 idle revisited and other comments
Man I think you found my problem!!!! My mixture screw doesn't
do much backed out, just the same!!!!
Please post this to the list!!! I'am sure that others would
benefit! I would but I have been kicked off!
Thanks
Eric Zeno <emz@nauticom.net>
86 VW-4x4
86 GL For Sale (Pgh. PA)
72 240Z 1936 Chrysler
On Tue, 8 Apr 1997, Tom Young wrote:
>
> On Tue, 8 Apr 1997, ERIC ZENO wrote:
> > Hummmmm..... return spring in the sensor.... Could you be more
> > specific as to what this is, and what you did?
>
> In the "swing arm" type sensor (like L-Jetronic) the movement of the air
> vane is resisted by a wound spring which looks like the spring in a old
> clock. Over time this spring weakens, which results in the air vane
> staying in a more "open" (i.e., rich) position than when it was new. In
> my case, the spring was weak enough that even with the idle mixture screw
> backed out fully, the mixture was still too rich.
>
> If you pop the plastic top to the air sensor you can see the spring.
> It's below a toothed wheel to which it's attached. The wheel is kept
> from spinning by a spring-steel lever arm which is lodged in one of the
> teeth. The idea is to turn this toothed wheel in a clockwise direction,
> which "winds" the spring, more effectively resisting the movement of the
> air vane.
>
> If you try it, mark the position of the wheel so you can put things back
> the way they were if you need to. Put the idle air mixture screw in the
> middle of its range of adjustment. With the engine completely warmed up,
> detach the O2 sensor and attach a volt meter to it. Then turn the wheel
> (it helps to have a third hand) clockwise until you bring the voltage
> from the O2 meter into the .5 volt range.
>
>
> ---------------------------------------------------------------------
> Tom Young young@sherlock.SIMS.Berkeley.EDU
> Lafayette, CA 94549 '81 Vanagon
> ---------------------------------------------------------------------
>
>
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