e90 start up problem ??

[ajk671]

Hi lads, not having much luck with this e90 , its a 2008 318i msport , over the past few weeks the car has had problems starting on a morning , sometimes it starts first time but most of the time its cranks for a while before starting, the longer the car sits it seems the longer it takes last time it took about 15 minutes of trying then eventualy starts and drives fine, any ideas ? thanks

[helix402]

Probably a faulty injector or rail low pressure sensor.