insignia 2.0 cdti cold start problem

[rugby1965]

hi i have a insignia that wont start from cold but will start with a squirt of easy start then will run fine till it is left all night  also i have high pressure at the fuel rail help needed thanks

i have had it code read and not faults found 

[Vauxhall Owners Club]

Sounds like Glow Plugs not working at their best?