Originally Posted by
STi_FTMFW
You running EM? If not then that's probably why your getting a cel. These cars don't like mods without EM
That sounds it might be the prob. If your light is still on reset the ecu and see if it is still there. Did you reset it after the mods were done on it as well? Unabomber's mani on NASIOC has a good amount of info on ecu reactions to different mods.