The 2003 Ford Expedition 4.6L 2WD idles fine when cold at about 1000 RPM, but upon warming the idle drops to 700 RPM. When the throttle is past 1/3 the power flattens out. The Freeze frame data from the past 5 times the Check Engine Light came on shows the following items (results side-by-side):

OBD2 P0 Codes 171&430 P0171 420&430 171&430 P0430 P0171
Fuel Sys1 CL CL CL CL CL CL
Fuel Sys2 NA NA NA NA NA NA
Calc Loan% 92.94 79.61 50.98 90.20 71.76 88.63
ECT (f) 89 89 90 92 90 94
STFT B1% 3.13 7.03 -6.25 5.47 -2.34 9.59
LTFT B1% 24.22 29.69 14.06 24.22 8.59 24.20
STFT B2% 0.00 1.56 -0.78 3.13 -4.69 -2.34
LTFT B2% -12.50 -14.64 -9.38 -10.16 -9.38 -12.50
Eng RPM 2608 2970 1278 2723 1434 2621
Km/h 94 37 59 100 54 61
Spark Adv (0) 20 18 38 23 31 21
IAT © 6 18 7 17 21 15
MAF (g/s) 78.01 81.22 18.77 70.98 25.00 63.62
TPS (%) 61.96 45.88 22.35 56.08 27.45 49.40
O2S B1 S1(v) 0.75 0.10 0.87 0.14 0.80 0.09
STFT B1 S1(%) 3.13 7.03 -6.25 5.47 -2.34 8.59
O2S B1 S2(v) 0.79 0.12 0.82 0.21 0.72 0.25
STFT B1 S2(%) 99.22 99.22 99.22 99.22 99.22 99.22
O2s B2 S1(v) 0.76 0.90 0.76 0.11 0.26 0.78
STFT B2 S1(%) 0.00 1.56 -0.78 3.13 -4.69 -2.34
O2S B2 S2(v) 0.82 0.83 0.19 0.37 0.55 0.75
STFT B2 S2(%) 99.22 99.22 99.22 99.22 99.22 99.22

P0171 = System too lean (bank 1)
P0420 = Catalyst System Efficiency Below Threshold (Bank 1)
P0430 = Catalyst System Efficiency Below Threshold (Bank 2)

I had just replaced a bad fuel pump and filter. The two hoses going from the exhaust to the EGR EVP keep blowing out when under a full load, perhaps the catalytic converter is shot and is blocking the exhaust?

I put the new PCV valve on the wrong valve cover so it ran with two PCV valves and an extreme amount of vacuum for a while, not sure if that messed something up.

Any ideas on what is causing the problems would be appreciated.

Thanks!

John