I have an AEM Brute Force intake for my '04 F150 5.4L, and my Edge unit (along with the check engine light) is reporting a lean condition in both banks (codes P0174 & P0171).

The MAF sensor is clean, so I thought that I might have a leak somewhere; so I took the truck into the dealer to see if they could find any leaks or a bad PCV. Everything checked out ok (no leaks); and the tech told me that there is 'too much air flow going through the MAF sensor' causing a lean condition. Running the Edge at level 2 has not compensated for this either.

So, other then the options of going back to my stock intake or a different intake or custom tune, I was wondering if an aftermarket MAF sensor like the one from Granatelli would help my problem? I'm under the assumption that the stock MAF sensor can't read the high air flow that the AEM intake has, and thus a higher-flow MAF sensor should help.

Am I wrong with that assumption? What do you guys think? Thanks in advance!

 

I can assure you that it is not to much air thru the air meter but the fact that you have upset the "calibrated factory airflow" (called tranfer function), from the stock air intake such that the meter is not sampling the airflow in a proper fashion.
A custom tune should account for it from the right source.

 

exacty. The MAF takes about 10-20% chunk of the specific diameter of tube and the computer uses that to determin air flow through the hole tube. the airflow need to have the same air speed through throug the hole tube(top, bottom ,sides) not like in a bend where outside edge flows faster. Also if the diameter is changed from the factory diameter that the MAF was mounted in the computer needs a new calibration.

 

This same identical question is posted in 2004-present too. Multiposting=Bad.

 

Yeah, sorry about that. I went to delete this thread, but can't seem to find a delete function.

 

I think the mods do that, like they don't have enough to do already.