I have exactly the same problem with mine. I'm waiting for someone to throw
out an idea as to what it may be.

Mark

>From: "Mike D." <md03@XOCHI.COM>
>Reply-To: "Mike D." <md03@XOCHI.COM>
>To: vanagon@GERRY.VANAGON.COM
>Subject: Cold idle mystery
>Date: Wed, 16 Jun 2004 16:37:39 -0700
>MIME-Version: 1.0
>Ok, time to put on your thinking caps.  Can anyone solve this by
>sheer brain power alone?
>
>Details:
>   1985 1.9l Westy w/Auto Trans and Air Conditioning
>   145k miles
>   Compression fair (around 120-125 each cylinder)
>   Recently replaced Digital Idle Stabilizer
>   Recently replaced AFM
>   Timing @ 5BTDC
>
>Symptoms:
>
>When warm runs fine.  Get 17-18mpg on the highway @ 65mph, so I don't
>think there is any gross mechanical problem with the engine or
>mis-tuning.
>
>When cold (60F), it starts right up, but quickly (either immediately,
>or within a minute or two) the idle is rough and the engine will die
>when in Drive, and sometimes even when in Neutral.   I have to keep
>one foot lightly on the accelerator to keep it from stalling.  Within
>about 10 minutes of driving, the problem goes away.
>
>I've tried setting the idle higher when cold (with a few turns of the
>idle adjustment screw).  This solves the stalling problem when cold,
>but then when the van is warm, the idle is way too high (1500+ rpm).
>
>I've gone through the Bently and done most of the electrical digijet
>diagnostics  (resistances of temp senders when cold and hot, etc.)
>without finding anything amiss.
>
>Ideas?

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