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.