Try trading out your ECU with a known good one.

This was the symptom that my Golf was showing when they diagnosed it as a
faulty ECU at the VW shop here.

Apparently the warm engine (or even just warm summer temperatures) does not
require such intense FI adjustments to be made by the Digifant system... the
car can run.

However, as soon as it is cold, and your temp sensors are sending important
data to the ECU.... that is when the idle needs some help from the computer.

Good Luck!

RSF

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<�)))>{   <�)))>{   <�)))>{   <�)))>{   <�)))>{   <�)))>{

Robert S. Fish
Salzburg, Austria
1987 Wolfsburg Vanagon 2.1 GL Weekender
1987 Golf Cabriolet
1991 Golf

> once it is a bit warmer, this does not happen. any
> ideas as to what might cause this to happen?