Dodge Repair: engine running rich, dodge durango, lean mixture

Question
My wife has noticed over the last month that her 2000 Dodge Durango has had an ignition miss. Then last week it started lossing power and running rich on fuel. I checked it with a code reader and it said that Bank 1 is reading a lean mixture, so I changed the O2 sensor in front of the catalytic converter. It is still running rich, could there be another sensor bad that has caused this problem, such as a IAT or MAP sensor?

Answer
POSSIBLE CAUSES
FUEL FILTER/PRESSURE REGULATOR (HIGH PRESSURE)
KINKED/RESTRICTED FUEL SUPPLY LINE
TPS VOLTAGE GREATER THAN 1.1 VOLTS WITH THROTTLE CLOSED
FUEL PUMP INLET STRAINER PLUGGED
FUEL PUMP MODULE
MAP SENSOR (OUT OF CALIBRATION)
TPS VOLTAGE CHANGE NOT SMOOTH
ECT SENSOR (OUT OF CALIBRATION)
FUEL PUMP CAPACITY (VOLUME) OUT OF SPECS
ENGINE MECHANICAL PROBLEM