Too lean, help!!

[TJF150]

I put a tornado in my K&N intake yesterday figured what the hell i've run them before no problems. Starts running like crap then throws code too lean in banks one and two!! I can modify the MAF parameter will that help?? What can i do??

05 F-150 5.4
U7151
K&N CAI

[TJF150]

I looked in the book and online for updated instructions and there are none for modifying the MAF parameter. I turned it up by 7% and its not as bad as it was i can turn it up to 10% but i really dont want to kill my truck. I could really use some help.

[kmac1]

I looked in the book and online for updated instructions and there are none for modifying the MAF parameter. I turned it up by 7% and its not as bad as it was i can turn it up to 10% but i really dont want to kill my truck. I could really use some help.

Take the tornado out and get a refund. Placing anything in front of the maf will give you nothing but hair loss! Airflow over the maf needs to be straight, clean and free of any turbulence in order for the PCM to have a usable signal.

Kevin@DiabloSport

[TJF150]

Should i leave the the MAF turned up for the CAI?

[kmac1]

Should i leave the the MAF turned up for the CAI?

Typically I've seen K&N's lean out most vehicles 5-10% so, yes I would leave it around +5% to be safe.

Kevin@DiabloSport

[TJF150]

I took the Tornado out and now its fine. That thing is going back. I left it at +7% the K&N seemed to make a big difference so i'll probably leave it there. Thanks for the advice Kevin.