P0171 lean code

I have read alot of threads AND paid three Subaru dealers to try to find a leak unsuccessfully. If someone can meet me to help look for the vacuum leak I will be eternally in your debt.

2005 lgt manual sedan. Catless up/hf down. Cobb stg 2 tune. Already replaced front o2 and cleaned maf.

The most common source of P0171 is a post-MAF intake leak. Try pressurizing the intake like so:

 

Take an aerosol can cap and drill a hole in it and insert a tire valve. Remove the airbox to turbo inlet tube, insert the cap in, clamp it down, hook up an air compressor. Listen for leaks.

I'm not handy enough to construct that and don't have a compressor. But thanks for the suggestion. I'm really hoping a member is nearby who can help me find it.

Attached are my logs. If anyone can make heads or tails from this let me know.

datalog2.csv

datalog3.csv

datalog4.csv

Unfreakinbelievable. I have had three subaru dealerships and two private mechanics look at my car to try and get rid of this code. Today I take my intercooler off lookin for the infamous "t connection" where a hose might have popped off. However, the t- connection is fine. So I start lookin around. Sure enough, there is NO clasp holding the air intake on to the turbo. There are rubber nubs but no metal ring holding it on. I get a clasp from auto zone and the car idles perfect. AF ratios went from over 16 at idle before, now just over 14.

 

Thanks to all for helping me narrow down the issue. Without everyone's help on here I never would have known what was wrong or even where to start looking.

Good stuff.