I am having trouble keeping my fuel pressure constant. I have changed the regulator diaphram, the pump relay & the pump is only 2 years old. With the pressure gauge hooked up, the pressure only comes up to 3 to 5 pounds when you turn the key to the asssecory position & falls right off until the motor starts. If take the injector pod off adjust the pressure & reinstall it the pressure goes right to 12psi where I want it. However it seems to fall off everytime you start it again till after about 30 days & I have to do it all over again? I ahve also changed the disphram spring too. Anybody have any ideas?