I started my 04 WRX this morning and it had a CEL. This was very curious, so I drove to Starbucks and had absolutely no power/no turbo spool. It was also making a pinging noise. (Read next sentence with an open mind) - My only mod, stupid as it is, is an AEM CAI. I know I am getting rid of it, by why would this cause this to happen. Oh yah...I then started the car up leaving the parking lot and of course still had a CEL, but had my turbo back like new. I don't need to hear my CAI caused this, but would appreciate an intelligent response as to why driving there it was like driving a Honda civic and on the way home I had my WRX back.
Thanks in response