Mike

I�d start looking for leaks in airhoses (vacuum), intake manifold and
gaskets and also contact spray all connectors back there...
I�d also check the time since the latest fuelfilter change if it�s the big
filter under the floor model.
And airfilter, if it�s full of dust it might be like an additional choke
which might fool the CPU
It�s wise to do a little at the time so you see what the problem really was
though :-)

Good Luck
Calle

----- Original Message -----
From: "Mike D." <md03@XOCHI.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, June 17, 2004 1:37 AM
Subject: Cold idle mystery

> 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?
>