For an '87 2.1 WBX:

Part 1:
My van had started to die after starting from cold recently.  It would start right up and idle okay, but die at the first stop sign 250 feet away.  I had bought an idle stabilizer control unit on Ebay, so I put it on.  Now I notice a difference.  It does seem to work okay, but the idle seems to be right under 1000, and pulsing up and down a couple of hundred RPM, maybe twice per second.  

I am wondering if this might be a difference in how the controllers work from different years, or if my "new" one has a different kind of problem.

Part 2:
Does anybody repair and test these things?  I'd rather have mine repaired than just keep buying unknowns from used vans.

Thanks,

Tom Salicos
'87 Westy Syncro