c5 2.2hdi wont start when warm

[gregstevens1973]

my c5 has had a new turbo and inter cooler new staring motor and a map censer but still wont start when hot any help would be great ive spent loads on this car its on a o2 plate many thanks Greg

[GiveMeABreak]

Initial thoughts are that it is the Coolant Temperature Sensor. If you unplug it does the car start ok? Doing this will make the ECU revert to the default settings and it should start fine, that will determine if the sensor needs replacing. I would suggest getting somebody to check it over with a Lexia - but if it is the Coolant Temp. sensor, this is unlikely to show a fault.

[gregstevens1973]

funny u saying that as ive just bought one havante tried or fitted it yet but will try and unplugging it and see if it starts when hot thanks for the advice