Been trying to figure this out for a while now and all I hear is fuel pump but no symptoms and trims 0 out under load or highway but that was before the tune. I watch long term and it sits about 10-15 at idle but there are no vacuum/boost leaks as I've tested that. I have however have found an exhaust leak at the turbo/cat. Also if I reset the mpg during highway I can see it's still good but idle or city drops to like 26 and used to get 31ish (pcvfixkit). I've also tested cylinder compression and that was fine. Fuel pressure is fine 43 idle which is in range but at rail I've found it at 40? Only reason the cat was removed was from a misfire from a bad coilpack but got p0420 2 months later on the aftermarket cat then trims started to go up and still is after I got a hold of a working oem cat. I did however got a p0171 lean during highway but fuel cleaner fixed that but not trims. Also to note trims tend to 0 out in park or neutral.