disintended nondeceleration....

[Swann, Benjamin R. (BSWANN)]

Jim,

I played with cleaning the ISV too.  The cleaning will undoubtedly help,
once you get the problem resolved with the ISV control.  You should see the
idle raise when you disconect the connector and normalize when you connect
it.  There should be + voltage to one of the leads - the center one I think.

Another thing that may be a problem.  The O-ring seal on the throttle body
adjustment screw deteriorates.  This causes air leaks and sometimes the
screw actually backs out on its own.  Check this and replace if necessary -
the whole screw with O-ring is only a few bucks a the dealer.

Ben

-----Original Message-----
From: jim rose [mailto:sf5ktq at hotmail.com]
Sent: Monday, May 07, 2001 3:51 PM
To: BSWANN at arinc.com
Cc: quattro at audifans.com
Subject: Re: re. disintended nondeceleration....


i cleaned the ISV last night (couldnt believe the seemingly endless amount 
of crud that i gumout-ed out of it) and tightened / checked every vaccum 
line in the western world for leaks/crakcs etc. as well as played with the 
linkage, and tightened the adjuster bolt to the discc-shaped vaccum 
controller (1/2 rubber, 1/2 metal about 2.5" in diameter - what IS that 
thing?) as the linkage was loose.

alas, to no avail. off to look at /check the switches. thanks for all 
advice, ill post up when i get it sorted.

i never knew how much i used the engine to slow the car till now.

-jim


>Jim,
>
>Concentrate on finding the most likely culprit being a problem with the
>WOT/IDLE switch or circuit.  I have had problems with mine on a number of
>occasions.  1) Switch can be flaky - replace 2) Wires to the swith can be
>broken - check that you are getting +V to - through connector 3) Switch is
>tricky to adjust, and can be tempermental - even when new.  I have found 
>and
>resolved all of the above problem with mine at one time or another.  In all
>three cases, resulted in the problem you describe.
>
>Ben
>'87 5kcstqw
>'85 4kcsq
>
>[soooo.....    my 5ktq is having some issues slowing down.
>
>when i let off the gas or downshift, the motor decelerates VERY slowly,
>giving a "cruise-control" effect. it is an intermittent problem, about 70%
>of the time. also some rmp's are "stickier" than others. idle is also high
>when the problem rears its head. 11-1500 from it's usual 8-900.
>
>check of the linkage turned up nothing apparently out of place. i didn't
>want to just add some slack in the adjuster bolt at the throttle lever.
>there are 2 VERY suspiscious vaccum doodas right there attached to the
>throttle arm/lever. any thoughts?
>
>thanx, all
>-jim]
>

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