sorry to bump this old thread, but didnt wanna make a new one, anyways i figured out why my CEL was on? today i was going to put back the stock airbox etc becuase my car has been running bad since the intake install, well anyways as i was getting ready to unscrew a bolt on the intake, i noticed a small hose not hooked to anything, found where it needed to go, reset the battery and took a drive, and that turned out to be the problem. I was a happy man, car runs so good now with intake and evo2 catback. just thought id let everyone know in case someone runs into the same problem some day. THANSK