Type 85 cruise control

[Brady Moffatt]

My guess on this problem, which happens on my 86 4kq, is that the pump
and/or the hose to the diaphragm are partially clogged with goo of some
sort, probably road grime. For almost a year now, I've said I was going to
clean out the pump by running a solution of soapy water through it, but I
haven't yet. That solution is in the archives somewhere, and it worked well.

To find the pump, just follow the long rod back from the throttle plates,
back past the round rubber diaphragm, along the hose, to the little electric
pump sitting on a base near the brake master/booster.

HTH.

Cheers,
Brady Moffatt
Montreal, Quebec, Canada
86 4kq with 306,000km
86 4kq parts car
72 Datsun 240Z with 180,000 miles
92 VW Golf with 194,000km FOR SALE
in early stages of quattrosis accumulatus

----- Original Message -----
From: "Jason Mawhinney" <jmawhinney at nc.rr.com>


> Yep, mine does the same thing.  When the engine bay warms, it works faily
> well!  What kind of weirdness is that?  I'm going to check very thoroughly
> in the engine compartment (I've already replaced all the hose in the
engine
> bay in my coupe).  Maybe the pumps not working to its full potential?
> Jason
>
> At 04:15 AM 2/22/2003 -0800, you wrote:
> >Jason,
> >
> >I've had the exact problem on my '85, and mine's definitely
> >temperature-related.
> >Sometimes, after things warm up in the engine bay, it will function.
> >I've got a spare car, but don't know where the pump is.
> >Is there a chance you could shoot a picture, and point me toward the
pump?
> >
> >Thanks!
> >
> >
> >  ~ Doug
> >
> >
> >-----Original Message-----
> >From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com]On
> >Behalf Of Jason Mawhinney
> >
> >Anybody else out there have their cruise controls not work properly at
~40
> >degrees and below?  You can set the cruise and feel the pedal "lighten"
> >under your foot but doesn't seem to have enough strength to hold the
> >speed.  Its really strange since the cruise controls on both my cars work
> >exceptionally well in warm weather.  I would think that someone else out
> >there has this problem since both my coupe and my 4kq 20v have this
problem.
> >Anyone have any ideas on what to check?
> >Jason
> >'85 4kq 20v
> >'86 coupe GT
> >'87 5ktq
>
>


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