Fuel pump drawings none starter problem

[Poodle]

I've yet to see a rail pressure sensor actually cause problems, despite being a seemingly popupar scapegoat. You won't be able to test it without a multimeter or pp2000 anyway. I would check the connections though, especially the yellow plug that clips to the block just below the starter, i didn't think of that the other evening.

Regarding the lift pump feed, you could just use a bulb - fluctuations in voltage will show up as the bulb dimming and brightening. It should be a straight 12 volts, so the light should be steady.