Check the crankcase vent breather hose on top of the engine. It connects
from the round thingy on top to the AFM. Mine rotted, had a hole
underneath, and I had the same symptoms as yours. Replaced hose, problem
disappeared. Check all your vacumn lines.

Regards,

John Rodgers
88 GL Driver

Mike D. wrote:

> 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?
>