This ISV - ISC thing has been a problem for a lot of folk for a long
time. Right now I'm running with the ISV unplugged because of what it
does when connected -- basically causes my engine to jerk slightly
especially when lightfooted on the gas.

Ia know the ISC is expensive, and is problematic So I wonder if it is
possible to build a replacement from components from the electronics
store. Darrel Boehler came up with his wonderful Digifant Digitool, I'm
putting together a circuit board to interface with my Desktop PC that
allows control of 8 electric kilns or other devices related to my
ceramic work.

Why not a homebuilt Idle Stabilizer Control unit?

I'm not knowledgeable enough to work out the parameters, but I can
surely follow a list of materials and work a circuit board up from a
circuit diagram, if anyone could come up with such a thing.

John Rodgers
88 GL Driver

Mark G wrote:
> Just got my '87 Westy back from the shop today. I wanted them to install new ground cables and clean all the grounds. I also wanted them to check a surging problem, and a cold idle problem which (of course,) mysteriously vanished on the drive over to them.
>
> They suggested I install a new idle stabilization valve and a new idle stabilzation control unit. (Both very expensive) Anyway, upon arriving at my driveway and putting the van into park, the idle shot up to about 2500 RPM and stayed there, even after I kicked the throttle a bit.
>
> FWIW. The ISV is definitely buzzing, and I cleaned all the contacts on the control unit a couple of months ago. Any ideas?  This needs to be sorted out soon, as this van may be a daily driver come March.  TIA.
>
> Mark Garcia
> Alhambra, CA
> 1987 Vanagon Westfalia (for going slow)
> 2000 Passat 1.8T 5SPD(for going fast)
> 1981 Vespa P200E (for just going!)
>
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