My battery was ancient and finally died on my while I was working on the car one night about a week ago. I ran out and got a new one before the shops closed, put it in, and when i drove off...funky things happened! For starters the trip computer now works, didn't before so now I have fuel milage and what not which is good. The fogs work properly when wired back in (stock ones, they would flicker probably due to low volt). I have an APR stage 2 93 tune, on my boost gauge I used to spike 20, then it would hold onto 17 for a little then 15 then drop. Now it will spike and hold 15 for a little and that's it. Yes I have the fully loaded ECU and yes I switched it back into the 93 tune because when the batter died it reset to the stock tune because that's my number 1 file. The car isn't throwing any codes, suggestions please?