i was having trouble with my fuel pressure only showing a max of 45psi even under boost (it should max out at 70psi)....V1 8#'s, t-rex inline.... i found gas leaking from the bottom of the FMU so I tightened the four allen screws inside the FMU (holding the valve body). now my car maxes out at 76psi. my question is this: when i turn the car off my fuel pressure gauge holds pressure at 40psi for a long time. IS THIS NORMAL? I thought before that the needle just dropped to zero just like the other guages do when you turn your car off. this may be a stupid question but i'm ignorant when it comes to the mechanical side of cars. Thanks for any help.