my version of the idle problem

[blake at clockworm.com (Blake Irvin)]

my 16v has some of the (i guess famous) scirocco idle problem(s)

starts fine, then runs for a few minutes very well

as the engine starts to warm up, but isn't at normal temp yet, it  
begins to stumble pretty badly - have to dance on the gas to keep it  
up, and it's no use driving anywhere in gear during this phase.

as soon as the car is warm (temp gauge near the middle), the idle  
smoothes right out again.

any ideas on what causes this behavior?

blake/