Difficult Starting When Engine Is Hot

[potterer]

During recent months my Galaxy has developed a problem in that it is or takes a lot longer to start when the engine is warm/hot. I have owned it for about five years and has never been like this. It starts perfectly when cold.

I have had a full diagnostic check which shows no faults. I have been told it could be something to do with the EGR or the injecton system. Any ideas?

There is also some black smoke when accelerating.

[Masked Marauder]

It could be the temperature sensor causing over fueling when hot.