2000 f150 5.4 still running rich and occasionally throwing po175 code

new exhaust
new cats
new o2
new muffler
new plugs
new coils
new injectors
new fuel filter
new maf
new air filter
fuel pressure 34 will hold pressure for more than 20 min no sign of fuel in vac line
vac 18

fuel system cl
calc load 33%
ect 151
stft b1 -4
ltft b1 -13.3
stft b2 +4.5
ltft -20.3
rpm 782
spark adv 19
iat97
maf 1.01
if anyone has anymore ideas of what to check next im all ears

 

In your list of PCM data, the temperature shows 151 and idle at 782.

The long term fuel tables while not out of range show opposite readings, where they should. e zero or both shifted in the same direction.


.

Questions; Was the motor up to running temperature?

If not the fuel will be rich until the operating temperature is in the 195 to 200 degree range and idle comes down to. about 750 +/- 50 rpm.

Is the thermostat faulty or the IAT sensor faulty?


Next, the fuel trim tables suggest something going on with fuel injection.


The rest of the work and parts don't much apply to the problem.
The leads are all in the data list as described above.
Also once the fix has been applied, the PCM should be powered down to reboot the program and clear the tables so you can see if the problem has ben resolved after sufficient drive cycles have been made, then look at the data again to be sure or continue to track the cause of data out of normal expected performance ranges.
You have the tools to see but apply the operating data normally expected...
Good luck.