The problem occurs when I start my '84 944 up for the first time each day or after it has sat for a few hours. It will initially start right up and idle smoothly for about five minutes or so. It will then die or stall as I start to drive away. When it first dies it will crank and crank and not start. If I wait a few minutes it will start up but be extremely loaded up. After running for a minute or two it will clear out and run and start the rest of the day. If it sits for a few hours it is the same routine over again.

 

What is your cold and warm Idle RPM?

 

sounds like DME relay? or even DME... had the same problem on my dads car, turned out to be toasted dme, after awhile it just died, it wouldnt even start anymore.