Chrysler Repair: 2002 chrysler town n country, sensor operation, chrysler town

Question
i am a shop owner in need of some help. i have a 2002 town n country. vehicle misses and runs rich. lt fuel trims at idle are at -24, fuel pressure is at 62lbs and is very steady.ive changed plugs,wires,fuel filter. lower intake was leaking coolant so we fixed that. still same problem. runs rough. compression is at 160lbs on all cylinders.sometimes the miss fire counter works and we see miss fires on 5 and 6. the only codes that come up are p0172. all adaptive memories have been reset and still same problem.  Tom. cat was removed to see if it was clogged. vehicle was started with cat off and adaptive memory was reset but problem is still the same. good blue to purple spark on the coil pack on all prongs. injectors all ohm out at 11.2 and flow seems to be equal. 2002 chrysler town n country 3.8l. 183k miles

Answer
P0172-1/1 FUEL SYSTEM RICH
When Monitored and Set Condition:
P0172-1/1 FUEL SYSTEM RICH
When Monitored: With the engine running in closed loop mode, the ambient/battery
temperature above 20 deg. F and altitude below 8000 ft.
Set Condition: If the PCM multiplies short term compensation by long term adaptive and
the result is below a certain value for two trips, a freeze frame is stored, the MIL
illuminates and a trouble code is stored.
POSSIBLE CAUSES
INTERMITTENT CONDITION
O2 SENSOR HEATER OPERATION
O2 SENSOR
EVAP PURGE SOLENOID OPERATION
O2 SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
O2 SENSOR SIGNAL CIRCUIT OPEN
TPS VOLTAGE GREATER THAN 0.92 VOLTS WITH THROTTLE CLOSED
TP SENSOR SWEEP
MAP SENSOR OPERATION
ECT SENSOR OPERATION
ENGINE MECHANICAL PROBLEM
FUEL FILTER/PRESSURE REGULATOR (HIGH)
PCM