Bad Gas Mileage w/ Untuned Intake?

I have the mods in my sig and am getting a best of 14.9 mpg. I believe it's because I have the Airraid CAI untuned but URD doesn't have a MAF Cal for this intake. It was like this before I put my XTP spacer on. The intake tube diameter is like 5" which is bigger than the Volant and AFE systems which I believe is throwing my MAF off. Thoughts?

I'm thinking of going to stock box and XTP intake manifold spacer only, cleaning my MAF, and my TB with hopes of getting better gas mileage.

All opinions welcome. Thanks for your help!

 

http://www.tacomaworld.com/forum/2nd-gen-tacomas/303684-6-cyllinder-mpg.html
http://www.tacomaworld.com/forum/2nd-gen-tacomas/302971-terrible-mpg.html

 

Nothing in the thread that really applies to my question.

 

Bueller? Those with intakes?

 

The maf cal WILL work for you. Tune it with a wideband gauge, and enjoy your better mileage. Stock this motor runs very rich. With your intake it will for sure 100% run even more rich. Tune it.

 

We'll I pulled the intake and am running my stock box and panel filter with my XTP mani spacer. Feels great. Plus the wife hated the noise.