frequency valve, 200tq '89 MC2

[Dave Aukerman]

Congrats on the new ride.  Hope the V8 5spd is still in the stable.

Dave

----- Original Message -----
From: <edkellock at juno.com>
To: <orin at wolfenet.com>
Cc: <quk at isham-research.freeserve.co.uk>; <kbogach at home.com>;
<quattro at audifans.com>
Sent: Wednesday, January 24, 2001 8:00 PM
Subject: Re: frequency valve, 200tq '89 MC2


> Speaking of which...
>
> My newly acquired 89 200q MC2 has just been treated to
> new O-ring seal on the dipstick.  The old one pretty much
> disintegrated in my fingers as soon as I tried to remove it.
>
> So now, I'm wondering if the mixture screw needs a little
> fine-tuning.  I believe the idle speed is a tad low since the
> new O-ring.  It is quite steady, but low.  Before, I'm pretty
> sure it was fairly steady, but a bit higher.
>
> Ed
> Colorado Springs, CO
>
> On Wed, 24 Jan 2001 13:25:59 -0800 (PST) Orin Eman <orin at wolfenet.com>
> writes:
> >
> > I've seen this when someone has messed with the mixture screw and set
> it way
> > rich.  I think the valve fails to open when the duty cycle drops down
> to 5%.
> >
> > The two cases can be distinguished by hooking up a duty cycle meter.
> >
> > If the duty cycle is going down to 5%, you have to work out why.  Just
> > using the mixture screw to bring it back up may be masking the real
> problem.
> >
> > Orin.
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