The symptoms are of hot leaness (very evident - spray fuel in, it starts!!).

Two primary components are in play:
1) Water temp sensor.
2) Electrohydraulic actuator (EHA) on the fuel distributor (FD).

If the resistance of the water temp sensor is too low, the mixture will be driven in the lean direction. With a hot engine, unplug the sensor (high resistance). This simulates a cold engine. Is starting improved?

The EHA is the main mixture controller. When it is unplugged it is in the neutral position which is slightly rich. Try a hot engine start with the EHA unplugged.

If neither of these checks has any influence, there are some other components which can be tested, however these are the easiest and have the greatest influence.