proberly not the metering head mate if you have fuel at everything but the injectors
i had the same problem and i tried 4 metering heads
if you get it all primed up and undo the sensor of side of metering head make shore there is fuel there first as that was my problem i had fuel there but it was not letting it through that is the last route the fuel goes through before it goes to the injectors if you have fuel
it will be the wirein to the switch and it will be keeping shut hence no fuel