Car throwing p0171 after intercooler and downpour install

[Buggy323]

I’m having an issue with my 2018 ecoboost right now. I just recently installed a cp-e intercooler and a rev9 off road 3 inch down pipe along with new plugs from tune+ I have a new tune from unleashed but the car seems really down on power and started throwing a p0171 code. I’ve gone over everything and made sure it was all tight after blowing the boost tube off twice. The only thing I can think of is that the map sensor was damaged in the swap over. I can also hear what sounds like fuel hitting the turbo manifold and making a lid of puff noise at idle. I can upload a video if need be.

Thanks for the help and I’m excited to join the forum!

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[Yan]

I’m having an issue with my 2018 ecoboost right now. I just recently installed a cp-e intercooler and a rev9 off road 3 inch down pipe along with new plugs from tune+ I have a new tune from unleashed but the car seems really down on power and started throwing a p0171 code. I’ve gone over everything and made sure it was all tight after blowing the boost tube off twice. The only thing I can think of is that the map sensor was damaged in the swap over. I can also hear what sounds like fuel hitting the turbo manifold and making a lid of puff noise at idle. I can upload a video if need be.

Thanks for the help and I’m excited to join the forum!

https://www.mustang6g.com/forums/threads/p0171-system-too-lean-bank-1.80469/


Description
The adaptive fuel strategy continuously monitors the fuel delivery hardware. This DTC sets when the adaptive fuel tables reach a rich calibrated limit. Refer to Section 1, Powertrain Control Software, Fuel Trim for additional information.
Possible Causes

• Ethanol content in the fuel

• Fuel filter plugged or dirty

• Damaged or worn fuel pump

• Leaking fuel pump check valve

• Leaking or contaminated fuel injectors

• Low fuel pressure or running out of fuel

• EVAP purge valve is leaking when the canister is clean

• Fuel supply line restricted

• Fuel rail pressure (FRP) sensor bias

• Exhaust leaks in the exhaust manifold gasket or mating gaskets before or near the heated oxygen sensor (HO2S)

• Air leaks after the mass airflow (MAF) sensor (if equipped)

• Vacuum leaks

• Positive crankcase ventilation (PCV) system is leaking or the valve is stuck open

• Incorrectly seated engine oil level indicator

• Intake air turbulence due to incorrect air filter

• Contaminated MAF sensor (if equipped)

• Damaged MAF sensor (if equipped)

Diagnostic Aids
View the freeze frame data to determine the operating conditions when the DTC was set. Observe the LONGFT1 and LONGFT2 PIDs. Refer to Section 2, Adaptive Fuel Diagnostic Trouble Code (DTC) Diagnostic Techniques, for additional information and the appropriate pinpoint test for specific concern identification.