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Re: cruise contrl oscillations, uphill in '91 200tq
Operating the WGFV at .9 boost would have no effect as the engine/turbo are
not in a boost condition. My 91 200q on cruise holds very steady - you
don't mention if your boost gauge reading is changing. If your actually
decellerating, your gauge should go to about .2 or .3 and then back to .9
or whatever is required to maintain speed. Hitting resume on mine, the
cruise is very agressive, wanting to get to the preset speed quickly - I
hav had it go to 1.5 boost to accomplish this. Cool!!
> From: Phil Payne <firstname.lastname@example.org>
> To: email@example.com
> Subject: cruise contrl oscillations, uphill in '91 200tq
> Date: Tuesday, June 17, 1997 1:17 PM
> In message <Pine.SOL.3.95.970617112936.29298Afirstname.lastname@example.org>
Gideon Weisz writes:
> > i've noticed some strange cruise control behavior,
> > with my '91 200tq wagon:
> > picture going up a long slope, at 2800 rpm, with a boost pressure
> > of about .9 and in cruise control.
> > i would have expected that this would feel the same as if
> > a driver's foot was simply on the gas pedal.
> > instead, i get a second and a half of very slight acceleration
> > followed by a second and a half of very slight deceleration
> > (and during the deceleration an almost inaudible sound as of
> > a vacuum leak or an air leak), and this recurs regularly,
> > on off on off on off...
> Sounds like the wastegate frequency valve is being operated.
> Phil Payne
> Committee Member, UK Audi [ur-]quattro Owners Club