The fuel pressure specification for you car at idle is 44-49 PSI. If the fuel pressure test determines insufficient pressure the the in-tank electric fuel pump will need to be replaced. The fuel tank will need to be dropped to gain access to the fuel pump. Here is another tutorial to show you how to change an in-tank fuel pump:
I've attached picture steps below for removal and replacement of both the fuel tank and fuel pump on your vehicle. Hope this helps and thanks for using 2CarPros. Happy Holidays.
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.