mindflux: recently i installed a powerfc and retarded the base timing on the cas (its untuned). after i did this the car was very hard to start cold, takes a few hits of the key, take about 5 seconds to get upto idle (800rpm). so i rotated the cas back to centre and its all good now. it might be worthwhile checking that your cas hasn't slipped, or even advancing it a tiny bit to see what that does, just dont advance it too far.
-rb25