The car has now been fixed. The report from Cooma diesel on the pump was that a return line restriction caused damage to a valve. It also had a lot of abrasive wear. They are claiming it was all caused by my '4WD systems' long range tank. It was full of rust as it is plain steel with no coatings or treatment and was also full of metal. I flushed the tank when I fitted it drained it again on another occasion and yet they still go heaps of fine rusty metal out of it. Noting I have never had a drop of water in the filter, but have had heaps of metal. Anyway that leads to my next issue. I was charged top dollar for the pump to be reconditioned and yet the original PCM was used as it was functioning properly, which leads to the kicker, they won't warrant the PCM as I have a remapped ECU. I am pretty pissed as a common problem I have read about is the sensors connected to the PCM or the PCM failing. The mechanic also wouldn't refit my fuel tank if I wanted any warranty on the pump.