Intermittently popping a check engine light P0171 & 174 (Banks Lean) during long idles (once, maybe twice a month). LTFTs @ around 3 to 6 during throttle, 16 to 19 sometimes at idle & sometimes up to 26 on a large decel.
Stock Magnuson tune (stock Magnuson injectors and original pulley @ 5ish lbs. of boost, Volant CAI, original E85 fuel pump, stock exhaust, veh has 90k miles)
- Cleaned the MAF
- Checked for vacuum leaks, none found
- Reset LTFTs
- checked operating fuel pressure, stays solid 62ish lbs
need to get a wide band on it and see exactly where i'm at majority of the time....
Any input, greatly appreciated, thanks in advance!

 

Had a similar prob, found a vacuum leak in my CAI sys