WARNING: This page is about a different car, the 2007 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Lock Ring Remover/Installer #9340
Courtesy of CHRYSLER LLC
Fig 2: Test Kit, Fuel Pressure #5069
Courtesy of CHRYSLER LLC
Fig 3: Adapters, Fuel Pressure Test - #6539 And/Or #6631