input: [Typical Fault] High Pressure Fuel System : Loss of Rail pressure [Possible effect] Difficult staring Non Start Engine cuts out Excessive exhaust emissions Misfire Control unit reverts to limp home mode Rail pressure sensor signal out of expected range [Possible Cause] 
output: Worn fuel injectors with excessive back leak rate. Worn or defective fuel pump Too slow engine cranking speed Fuel pressure regulator,IMV,MPROP, wiring, etc