My truck didnt start a few days ago so my dad and I did a full tune up- we changed the spark plugs(in correct firing order) and the cables and i changed the oil and the fuel filter. We realized the pump wasnt working because it made no sound when the key was turned and the engine wouldnt ignite without starter fluid. So we dropped the tank installed the new pump and its definitely working but my truck still won't start! Idk what else it could be. I am not super car savvy but I do my best..does anyone know what the problem is most likely to be?? I am ready to tear my hair out!!!