3.0d only priming intermittently

[Kshamm]

Looking for some help as I am at my wits end.

I have an intermittent starting problem with my 2006 3.0d.
When trying to start I get “Fuel injection system” warning come up and you cant hear the fuel pump prime.

So I then turn it off and try again until I hear the fuel pump prime. Once it buzzes the warning doesn’t come up and the car starts straight away. Some times it starts first go and sometimes it takes twenty turns. It is not getting progressively worst and does not show any sort of pattern.

I changed out the fuel pump thinking that it was the culprit but no change. I swapped the horn relay with the pump relay and no change. I have a Foxwell scanner but it is not showing any codes that offer any help.

Can someone tell me what tells the fuel pump to prime or offer any other suggestions to try?

Thanks