325i wont start when warm

[Kasperh]

Hi i have a 86 325i that wont start when engine is hot. I have changed both the crank sensors on the gearbox housing, also have changed the temperature sensor for the ECU. New plugs and distributor and wires, also new main relay and fuelpump relay.
Engine starts fine when it is cold, or when i roll-start it. Does anyone have suggestions what my problem is?

[jeffnhiscars]

If it's a crank no start put a fuel pressure guage on it when cold then watch what happens when it gets hot. Took me 2 years to finally do that and it turned out to be my fuel pump. Old enough to work when cold but stopped when hot.