Sorry mate I have taken so long to reply. Mine working fine touch wood, I removed all the hoses connecting to the fuel filter and plugged one end and got a 60ml shringe the other sprayed dishwashing liquid on hose to look for air bubbles but I didnt find any. So I fitted shringe to the end of hoses from fuel tank and cleared the lines whilst I did this on one of the hoses it felt as if I released a blockage in the line, and since than no problems, I bought a scv but didnt change it still have it will probably come in handy one day. Hope this works for you too. Let me know how you go.
I am recently experiencing the same problems with my navara as you did last year, to do with the car stalling not long after starting, I was after what was your solution to this problem. Thanks.