You dont want to go down this rabbit hole, we have some members with some rather strong points of view on this, both ways.
I would say, make sure that you have no leaks or blockages and that the cut off on the IP is functioning, then if the problem persists, fit a lift pump. If this solves the problem, then you may have a weak IP fuel pump.
I would say, make sure that you have no leaks or blockages and that the cut off on the IP is functioning, then if the problem persists, fit a lift pump. If this solves the problem, then you may have a weak IP fuel pump.