I have a 95 4.3 vortec with the spider injection assy, I am getting good fuel pressure to the spider assy, however when you turn off key the fuel pressure will drop immediatly I have pulled the injectors and when I crank the motor over it will not spray fuel out of the injectors at all. I have replaced the fuel pressure regulator still nothing. I have the plenum off and when you turn the key on the fuel pump will pressurize, but you can see fuel and air bubbles running through the fuel return line. While the fuel pump is running if I push down on the schrader valve it shoots a stream of gas 2 to 3 feet in to the air. turn off key and the pressure drops off instantly. Is my spider assy just done working, I've been told that these things will just stop working and that is it they just stop working. Can somebody help me out here, Has anyone had these same symptoms.
