at the end of my wits with this truck, just need advice. My '96 gems 4.0 will start on ether, but not on its own fuel. The fuel pressure goes to just below 30 when turned on, but it's apparently not firing the injectors, I think... how can I check further for issues?

not here for companionship or camaraderie, just need advice. My '96 gems 4.0 will start on ether, but not on its own fuel. The fuel pressure goes to just below 30 when turned on, but it's apparently not firing the injectors, I think... how can I check further for issues?