I had an OS tune, moved across the country (couldn't recover old map), started running lean for some reason and the ECU felt like it was cutting fuel from 4000 to 6500 RPM so I overwrote w/ AP stage 2 AEM map. now my car is losing power on the top end and i can't figure out why (seems like the ECU is cutting fuel). hoping if i return to stock then run diagnostic i will see the problem and fix it. i am just concerned that the AP is blocking the code. it's funny though because the car was doing the same thing with the old tune. when i re-flashed it with the AP it ran great for a day (no loss of power). the next day it was doing the same thing. what confuses me is it was cutting fuel, then it wasn't, then it was. it makes me think it has to be the ECU compensating for something.
i am running out of ideas.
paul h - SSFD (super slow 4-door)