Cheers for the help

i have a new phase sensor stu, but whilst i didnt know what the fault was i didnt want to remove to much, but i will try that.

The Ecu is 100% working rog,

i though the pump my self its a brand new grp a one, i put the old one back in with exactly the same fault.

when the car turns over the is NO signs on it firing at all, not even a cough or a splutter

Im going to try relays again, the voltage at the pump on turn over is 12.7v , would that suggest all is well with that? or could the alarm still be stoping it? as i had started to suspect a faulty alarm