I have a 96 200SX SE-R,no mods right now but planning on a few.My problem is when i turn the ignition switch to start the car I dont hear the fuel pump come on.But if i leave the switch in the on position and wait 60-90 seconds I finally hear the fuel pump come on and the car starts up. I've already replaced the fuel pump relay. Could my fuel pump be slowly going bad or could it be something else?