Sounds to me like dirty fuel injector. They dump gas, not a spray/mist,
helf goes unburned.

            Eric                   86-VW4x4
            vw4x4@fyi.net          72-240z
            Pittsburgh, PA USA     1936-Chrysler

On Sat, 18 Apr 1998, Michael J Vickey wrote:

> I have experienced a similar problem with one of my 87 Syncro's. Cold start
> and run is fine. Problem comes when the engine begins to heat up. Too much
> fuel when running warm. I have switched out the blue temp sensor with a new
> one, tried swapping computers with one of the other Syncros, put on a
> brand-new airflow box, idle regulator, idle satbilizer, and switched O2
> sensors with a "used" one. Nothing has made a difference. I have given up
> and sent the vehicle to my mechanic, and now he is baffled.
>
> He did find the the low (hot) resistance given by the new temp sensor was
> not dropping quite low enough, but replacing it with another new one did
> not help either. Monday I should know if a new O2 sensor is going to make a
> difference.
>
> Any other suggestions would be welcome. When we discover a remedy I will
> post it to the list.
>
> Mike Vickey northwestern Pennsylvania - on beautiful Lake Erie
> vickrail@velocity.net
>
> My VW van collection:
> 84 Wolfsburg Vanagon (parts)
> 85 DblCab PickUp light gray
> 87 GL Syncro #1 Wolfram gray "Flash"
> 87 GL Syncro #2 dove blue met. "The Blue Flash"
> 87 GL Syncro #3 Wolfram gray
> 87 GL Brown "Betty"
> 88 DblCab PickUp slate blue
> 91 GL Westfalia Camper Orly blue
> 93 Eurovan MV Tornado red
>