Fuel(?) problem

[Steve Rissler]

My 200q20v has a problem in warm/hot weather... starts up and runs fine, but
once it has warmed up, when I turn off the car for a short time and restart
a short time later (1 hr or so), it will not maintain idle and stalls.  It
will restart, but stall again unless I can keep the accelerator pedal
pressed slightly.  Seems like a fuel problem - and it will eventually clear
up after about 10 minutes of driving and idle becomes stable again.  Only
happens in warm/hot weather - not at all in cold weather.  Is this some form
of vapor lock?  Bad ICV?  Anyone BTDT?

Thanks
Steve