renault traffic lacking power when first starting now stopped running ?

my van 02 plate it lacked power when first started for 10 seconds or so for a week prior to it failing then i got told it was maf and high pressure fuel rail sensor so changed then got told its a break in loom but i do not think it is there are no codes but the van illuminates stop flashing and flassing mil lamp in red when cranking any ideas injectors 4 ohms cut of solenoid or regualtor 17 ohms does the regulator power open ie power to pass fuel i have no pressure on steel pipe to rail when cracking even when cranking if the engine is cranking can i blank off metering solenoid for testing purpose and crack all injectors to test pump in situ this will point me to managment or high pressure fuel pump fail???? i have plenty of fuel during the prime ie 10 seconds or so of first turning ignition on but should it stop after this on low pressure side ie just after filter even when cranking i really like this van as do my kids and just want help do not know if to go buy ecu loom sensors or pump please help anyone that knows there stuff feel free to call on 07557791190 im in south yorkshire so advice or if you can come to me for a price and fix