Ok, so i just installed a aem brute force intake on my truck. 04 5.4L. right away the check engine light comes on. sometimes it will go off for a couple days but then come on again. wondering if there is anything i can do to fix this.

 

If all connections are properly conncted, then you are running very very lean. Re-install your OEM intake, get a custom tune for it, and try it again.

 

someone told me there is an aftermarket sensor you can get that will except the higher air flow. if not i guess i will put the stock one back in.

 

Did you reinstall the MAF correctly? Same location/direction as it was stock?

 

i am not sure if it is the same direction as stock but it is installed how aem tells you to. i have double checked it like 5 times.

 

04s came from the factory in a near lean condition. Quite often, any extra airflow will cause one to run lean. A damaging situation and not something to play with. You should get a tuner with custom tunes that will modify the air/fuel mixture range. Too, you really can't take advantage of a CAI without a custom tune anyway. Get an Xcal3 or a Gryphon and then you will be safe.

 

I've got an 04 with the AEM Brute Force intake. I also had the check engine light come on. Do you have the trouble codes?

My solution to the constant lean condition...
1- Bought Superchips tuner.
2- Cleaned throttle body
3- Cleaned MAF sensor - if you have the oiled AEM filter...the oil will foul your MAF and regular cleaning is needed.

Cleaning my MAF and throttle body solved my rough idle/stalling problem and have no codes. If I get codes PO172/4..then I clean my MAF...codes go away.

Changed my plugs this past weekend...after 149K on the OEM set....probably could of gone another 100K on them...but hey....why not break a few off in the the engine and have some fun . I thank the folks at Lisle for one sweet tool and one very easy plug change.

 

a superchips tuner will make the problem worse since it's a canned tuner

 

alright thanks guys. looks like i will change it back and look for a tune for it.

 

a custom tuned tuner not a canned tuner with custom settings