I just did a little more digging. Car has 247k miles. I first tried disconnecting the pressure sensor on the front of the rail and seeing if it would start. It would not. Then went into DAS and looked at rail pressure. While cranking it is in the single digits until you crank it for about 15 seconds or so then pressure starts climbing and reaches as high as 62 bar. This is nowhere near spec of 340-380 aprox. Does that low of number tend to rule in favor of the HPFP or the pressure regulator on the rail?