Possible Causes
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
AIR IN FUEL SYSTEM
DRB TESTS
FUEL PRESSURE SOLENOID
FUEL PRESSURE SOLENOID RETURN VOLUME TEST
FUEL PUMP
FUEL SYSTEM LEAK
INJECTOR RETURN VOLUME TEST