Ok, got my mechanical fuel pressure guage all hooked up and went to bleed the air out of the line from the Shrader valve to the isolator and I noticed the pump wouldn't cycle. It groaned a little once and that's it. So I started the engine and slowly loosened the bleed screw and the motor started dying like I was letting air IN. Apparantly the lift pump is dead?? Guage reads 0. Any ideas?