Hi Ric  -
I had the same problem and did the same thing and my idle is back to
"normal" now as well.  I still have to replace my exhaust and oxygen sensor
so its still kind of rough but its back to where it was before at least!

Peace,
Marla
'87 Westy GL "Vana Morrison"

>From: Richard Golen <rgolen@UMASSD.EDU>
>Reply-To: Richard Golen <rgolen@UMASSD.EDU>
>To: vanagon@GERRY.VANAGON.COM
>Subject: 87 Rough/High Idle problem solved (I hope)
>Date: Tue, 13 May 2003 19:36:13 -0400
>
>Hi,
>
>My 87 appears to be back to normal...its idling smoothly...and at the
>proper RPM. For a couple of months now at start up it would belch black
>smoke...run rough...and after warming up the idle would hang up at 1500 to
>2000 rpm.
>
>Disconnecting the ISV took care of the high idle. However, the rich
>condition at start up was still there...and it was getting to be a pain to
>warm the engine up until the cold start enrichment process stopped.
>
>That all stopped today. Chris Turner had a used ISV Control Unit and sent
>it to me. Popped the right rear tail light...reached in side...unplugged
>the old ISVCU, popped in the "new" one....reconnected the ISV...and VOILA!
>IDLE!! Smooth......no belching smoke...no misfiring. Drove it around for
>about 20 minutes and it idled normally. I think I'll take the Westy to work
>tomorrow and see what happens...got my fingers crossed!
>
>Ric

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