[Zeuseidon]

Little backstory. I have Gruppe-S Catless UEL header and overripe, JDL ultra quiet high flow front pipe, and Corsa Cat-back. Also Stage 2 93 OFT tune. Everything was runnin fine with this set up.

A couple months back I added a Perrin inlet tube, and freshly oiled K&N air filter. Around this time I started throwing P219a. It would come and go every tank or two of gas. Checked all seals around airbox and O2 sensor. Everything seemed good. Got some MAF cleaner and that seemed to do the trick.

Now I started throwing CEL P2097. My LTFT is 2.34 % at idle to about 6.25% when accelerating.Which I guess seems to be "acceptable" range? Also was under the car about a month ago changing diff and tranny fluid and checked for exhaust leaks. Looks like there may be some near the muffler (coupler loosened up is all) but that shouldn't be the cause of my code.

What should I check for next in the diagnosis progress?

Thanks in Advance