Oil pressure sensor is dead most likely. It carries the power to the liftpump so when the engine dies in a crash, the lift pump quits pumping fuel onto the hybrid you just squished.
Test power to and from it to verify, then Get a new ops and a relay harness kit from leroydiesel.com. The relay harness plugs into everything easily and takes the electric load off the ops so the new one wont burn out.
Options: you can build the harness yourself, get the ops as an AC Delco only- others are crappy.
Leroy also makes an ops extension hose that has a ground carried inside the hose that makes replacing the ops much easier. I had my own own made at a hydraulic hose shop, but it doesn't carry the ground so I had to add an extra ground wire, and mine was more $ than Leroys. I didnt know of him when I made mine
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That takes care of the fuel issue, as for air in the lines, you might be aerating the fuel because of it. Or a hose is loose somewhere and it is sucking it in. On the front of the injection pump there is a 4" long 1/4" diameter rubber hose (fuel return hose) that goes to a metal line connecting both sides of the injector return lines. Buy a piece of clear tubing and replace the lack hose. With engine running, watch for bubbles. Getting 1 trapped in there is ok, but if you have a stream of bubbles, it hat is indicitive of an air leak getting in. For the rest of the rigs life, instant diagnosis for the problem at a glance.
Btw, welcome and spend some time here reading through the stickys, a lot of $$ to be saved and improvements that can pay for themselves.
