I have and '88 and the thing that failed on my cruise control was the
easiest thing to fix - the rubber diaphragm on the server unit on top of the
engine near the throttle.  I temporarily fixed it with a little silicone
sealer when I found the tear in the rubber.  It was a snap to fix by just
replacing that part - no adjustments required.  When you engage the cruise
control, a vacuum is placed on this servo unit near the throttle and if the
rubber diaphragm has aged and developed a pin hole or worse, then the cruise
control just won't work.

It might not be that simple, but that's what I suggest checking as a 'do it
yourself' check' first.  It was several years ago that I had to make the
repair, but it was not an expensive part at the time.

John Graham
88 Westy
Charlotte, NC

On 1/26/06, Andy Highland <andy@420.am> wrote:
>
> I'm about to be the new owner of a '90 syncro in Northern California.
> One of the issues with the van is a non-functioning cruise-control. I
> asked Fred's in Redwood City if they could give a worst-case
> estimate, but they've never worked on the factory cruise control.
> Does anyone have experience with this? What would it cost for a
> complete diagnosis/repair of factory cruise-control, worst-case
> scenario?
>
> Thanks.
> andy
>