[s-cars] 1.8T coil odd behavior

[djdawson2 at aol.com]

OK... ever since I installed my 1.8t coil conversion, I have been repeatedly subjected to a weird behavior immediately following startup... hot or cold.  The car starts fine, and idles fine.  But when you try to feed in the throttle, it kind of bogs down as if it isn't getting fuel.  It simply won't take any pedal, and engine speed refuses to increase.  This lasts 15 or so seconds, and then goes away like nothing is wrong.
 
This behavior started immediately after my coil conversion, and occurs almost every time the car is started.
 
So... I had written off any possible connection between my coil conversion and this strange behavior until today.  This afternoon, Dennis Graber and I were working on his S6's A/C... and in passing conversation, Dennis mentioned this strange behavior on his S6... post 1.8t conversion.  I was laughing as he described the exact same symptoms I have following startup.  Hence this post.
 
My questions:
1) Is anyone else that has done a 1.8 coil conversion experiencing this same behavior?
2) What possible connection could exist between a change of coils, and this initial startup behavior?
 
That's it.
 
Dave