Just a general question. Should the fuel pressure stay when the car has sat overnight? I recently had a gauge T'ed into the fuel line to test the pressure. It read in range, and was fine while driving, but if it sits overnight the pressure is between 0-5psi. I've always had an issue of the engine cranking for a bit before it fires up if it sits for a few days versus firing immediately if it only sits overnight. Basically I was wondering if the pressure slowly being relieved while sitting is normal, and if that is contributing to it having to crank for a second or two after is has sat for a few days.

 

Fuel pressure always drops after sitting for a while, for most vehicles out there. Once the pump turns off, fuel releases back through the pump into the tank.