05 Crown vic, lean codes after CAI

Hi guys, i installed a AFE cold air in my vic and it would throw lean codes here and there , both bank 1 and 2 randomly. Tested for vacuum leaks and eventually i just put back the factory system to see what would happend and the codes stopped. So im guessing a MAF tune is required? since it has high LTFT's? I see theres a guide on MAF tuning in the chevy section, would that still apply for fords?


Here's one of the freeze frames i got, sadly i lost the data log i had with CAI on. and ive just been busy with work and its been wayy to cold out to reinstall and do more logging.

Freeze Frame: 0
DTC: P0171 - System Too Lean (Bank 1)
Number of Emission Related DTC: 0
Fuel System Status: 02 00
Calculated Engine Load: 48.6274509803922 %
Engine Coolant Temp: 84 ?C
Short Term Fuel Trim Bank 1: 1.5625 %
Long Term Fuel Trim Bank 1: 20.3125 %
Short Term Fuel Trim Bank 2: 3.90625 %
Long Term Fuel Trim Bank 2: 17.96875 %
Intake Manifold Absolute Pressure: 39 kPa
Engine RPM: 670 rpm
Vehicle Speed: 0 km/h
Timing Advance: 31 ?
Intake Air Temp: 18 ?C
Mass Airflow: 6 g/s
Throttle Position: 17.2549019607843 %
O2 Voltage B1S1: 127.5390625 mV
O2 Voltage B1S2: 569.98046875 mV
O2 Voltage B2S1: 82.59765625 mV
O2 Voltage B2S2: 4.98046875 mV
Run Time Since Engine Start: 118 s
Fuel Rail Pressure (Relative): 33700 kPa
Commanded EGR: 0 %
EGR Error: 0 %
Commanded EVAP Purge: 0 %
Fuel Level Input: 43.1372549019608 %
Warmups Since MIL Clear: 2
Distance Since MIL Clear: 10 km
EVAP System Vapor Pressure: 16349 kPa
Barometric Pressure: 102 kPa
Catalyst Temp B1S1: 496 ?C
Catalyst Temp B2S1: 496 ?C
Monitor status this drive cycle: 00 47 E1 E5
Control Module Voltage: 14 V
Absolute Load: 17.6470588235294 %
Commanded EQ Ratio: 1
Relative Throttle Position: 5.09803921568628 %
Ambient Air Temp: 8 ?C
Absolute Throttle Position B: 23.1372549019608 %
Accelerator Position D: 26.2745098039216 %
Accelerator Position E: 34.5098039215686 %
Accelerator Position F: 23.921568627451 %
Commanded Throttle Actuator: 8.23529411764706 %




Thanks in advance for any input and help.

If the inside diameter of the tube is bigger than the inside diameter of the stock maf, then yes, the whole curve needs scaled by the percentage that the new tube is bigger.

Quote:

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Originally Posted by 95Gturbo

If the inside diameter of the tube is bigger than the inside diameter of the stock maf, then yes, the whole curve needs scaled by the percentage that the new tube is bigger.

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That makes sense, i didnt even think about the internal size of the tube. the stock one is like 10mm smaller.

Thanks very much i appreciate your help.