It could be that both of the idle stabilizer units are bad (used ones
have a pretty high failure rate, especially the older ones with the B at
the end).  I would also try swapping in a known good idle air valve.
You have already checked and adjusted your throttle position switch,
correct?

Ken Wilford
John 3:16
www.vanagain.com

Richard Golen wrote:
> Hi,
>
> Now that I think I've found my cooling system problem, the idle on my
> 87 Westy seems to want to hang at 2000 rpm, and once in a while drop
> down to 1200 rpm. I've swapped out the idle stabilizer, disconnected
> and reconnected the plug on the stabilizer, checked to see if the
> stabilizer vibrates when it has power, etc. Right now I've
> disconnected the stabilizer and adjusted the bleed screw on the
> throttle body so I have a normal idle of around 900 rpm or so.
>
> Two questions:
>
> 1. What is causing the idle to stick at 2000 rpm? (I've also swapped
> out the stabilizer control unit with a spare). Suggested fixes?
>
> 2. Will any problems arise if I leave the stabilizer disconnected for
> a while?
>
>
> Thanks.
>
>
> Ric
>