Re: 93 90CS Auto transmission problem

[Daniel Adams <doasc@yahoo.com>]

Well, that seems to have fixed it.  I looked through the archives and
found detailed instructions on the R&R of the ISV.  The detailed
instructions describe removing a lot more items than I did to get at
the ISV.  Also, several people mentioned (in the Archives) to use
)xygen Sensor safe cleaner, etc.  Unfortunately I could never find
anything with that designation.  I did find throttle body cleaner,
which seemed milder than the carb&choke cleaners.

After removing the ISV, I was trying hard to understand what it does. 
It connects just past the throttle body, to two ports.  I couldn't see
anything in the ports to tell if they did anything other than feed into
the intake manifold.  THe ISV itself had an open port and what appears
to be a sliding gate.  The car was warm when I took it off and the gate
was open 2-3MM.  The gate was spring loaded and would spring towards
closing off and going past the 2-3MM opening.  I didn't mess with it
too much past that point.  So it opens and closes which ????  Anyone
know what this actually does.

regards,
Daniel Adams
93 90CS 99K

--- Todd Young <tyoung@wamnet.com> wrote:
> Clean out the ISV! If you don't know where it is, how to clean it,
> drop me
> a line, BTDT.
> 
> Daniel Adams wrote:
> 
> > A while back I posted about a problem I was having with my
> transmission
> > shifting.  The initial problem was with the upshift.
> >
> > This problem was resolved with new synthetic transmission fluid
> > (Mobil-1 Dexron-III).  Since, that problem has been fixed I have a
> new
> > problem.  When the car shifts out of the overdrive/lock-up 4th gear
> to
> > 3rd.  The engine will stall.  When the car is cold, it doen't do
> this.
> > As the car warms, I can see that each time it downshifts, the rpm
> drops
> > lower and lower (900 at idle, 750-800 cold downshift).  Applying
> the
> > brakes, during this downshift, accelerates the stalling.  My
> current
> > work around is to shift from 4->3 when I am slowing.  I do this
> before
> > the car reaches the downshift point, which is normally around 45
> mph.
> >
> > I just recently had the fuel injector recall, the driver's side
> > cat-convertor replaced (recall) and both oxygen sensors replaced. 
> I
> > had hoped the Oxygen sensor was contributing to the problem, but it
> > didn't have any impact on the problem.
> >
> > Any ideas would be appreciated.
> >
> > regards,
> > Daniel Adams
> > 93 90CS 99K-miles
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Bid and sell for free at http://auctions.yahoo.com
> 
> --
> -----------------------------------------------------------
> Quote for the day:
> Of course I don't look busy, I did it right the first time.
> -----------------------------------------------------------
> Todd Young              WAM!NET Inc.
> tyoung@wamnet.com       655 Lone Oak Drive, Bldg#A
> 651-256-5051            Eagan, MN 55121
> 800-585-1133 ext.5051   http://www.wamnet.com/
> '93 Audi 90S(|___\====OOOO====/___|)
> 
> 
> 

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